The code is very long. I will post only the method. Hope this helps:

public void SearchedContacts(){
if (filterAccountType == null) {
ApexPages.addMessage(new ApexPages.Message(ApexPages.severity.ERROR, LABEL.Account_Type_Mandatory));
} else if(filterCropInterest<> null && filterCropInterest.size()>0 && (filterCropsCon == null || filterCropsCon.size()==0)){
ApexPages.addMessage(new ApexPages.Message(ApexPages.severity.ERROR, LABEL.Select_Crop));
}else{
//resetPaging();
contactsList.clear();
acts.clear();
noContactsFound = false;

strAccQuery = 'SELECT id FROM Account WHERE RecordTypeId = \'' + filterAccountType + '\' ';

if (accFilter.SubType__c != null) {
strAccQuery += ' AND SubType__c = \'' + accFilter.SubType__c + '\' ';
}

if (accFilter.NordicSubtype__c!= null) {
strAccQuery += ' AND NordicSubtype__c = \'' + accFilter.NordicSubtype__c + '\' ';
}

if (accFilter.Base__Country__c !=null){
strAccQuery += ' AND Base__Country__c = \'' + accFilter.Base__Country__c +'\'';
}

if (accFilter.Language__c !=null){
strAccQuery += ' AND Language__c = \'' + accFilter.Language__c +'\'';
}

if(accFilter.Behavioral_CP__c !=null){
strAccQuery += ' AND Behavioral_CP__c = \'' + accFilter.Behavioral_CP__c +'\'';
}

if(accFilter.Behavioural_vegetable_seeds__c !=null){
strAccQuery += ' AND Behavioural_vegetable_seeds__c = \'' + accFilter.Behavioural_vegetable_seeds__c +'\'';
}

if(accFilter.Behavioral_Segment_Arable_Seeds__c !=null){
strAccQuery += ' AND Behavioral_Segment_Arable_Seeds__c = \'' + accFilter.Behavioral_Segment_Arable_Seeds__c +'\'';
}

if(accFilter.Behavioral_arable_seeds_2__c !=null){
strAccQuery += ' AND Behavioral_arable_seeds_2__c = \'' + accFilter.Behavioral_arable_seeds_2__c +'\'';
}

if(accFilter.Customer_Class_Arable_Seeds__c !=null){
strAccQuery += ' AND Customer_Class_Arable_Seeds__c = \'' + accFilter.Customer_Class_Arable_Seeds__c +'\'';
}

if(accFilter.Segmentation_arable_seeds__c !=null){
strAccQuery += ' AND Segmentation_arable_seeds__c = \'' + accFilter.Segmentation_arable_seeds__c +'\'';
}

if(accFilter.Company_Segmentation_CP__c !=null){
strAccQuery += ' AND Company_Segmentation_CP__c = \'' + accFilter.Company_Segmentation_CP__c +'\'';
}

Boolean checkPartner = false;
set<Id> accountIdsFromPartner = new set<Id>();
if(conFilter.AccountId !=null){
for (Partner__c par : [SELECT Account_Name__c
FROM Partner__c
WHERE Partner_Name__c = :conFilter.AccountId]) {
accountIdsFromPartner.add(par.Account_Name__c);
}
checkPartner = true;
}

Boolean checkAttribute = false;
set<Id> accountIdsFromAttribute = new set<Id>();
if(attFilter.Attribute_Name__c !=null){
strattquery = ' SELECT Account__c FROM Attribute__c WHERE Attribute_Name__c = \''+ attFilter.Attribute_Name__c +'\' ';
if(attFilter.Attribute_Value__c !=null){
String str = '';
for (String s : attFilter.Attribute_Value__c.split(';',0)){
str += '\'' + s + '\',';
}
str = str.substring (0,str.length() -1);
strattquery += ' AND Attribute_Value__c includes (' + str + ') ';

}
for (Attribute__c att : Database.query(strattquery)) {
accountIdsFromAttribute.add(att.Account__c);
}
checkAttribute = true;
}

if (filterTopGrowerOnly <> null && filterTopGrowerOnly){
strAccQuery += ' AND Top_Grower__c = True ';
}

if (filterTopGrowerOnly <> null && filterf2fOnly){
strAccQuery += ' AND F2F__c = True ';
}

System.debug('>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>' + strAccQuery);

Boolean checkCropCriteria = false;
Boolean checkProductCriteria = false;
set<Id> accountIdsFromProducts = new set<Id>();
set<Id> accountIdsFromCrops = new set<Id>();
boolean checkValueSegmentation = false;
set<Id> accountIdsFromValue = new set<Id>();
//set<Id> accountIdsFromCropFarmSize = new set<Id>();
if (filterAccountType == GrowerRtId) {

if (filterYear != null) {
strCropQuery = 'Select Cropping__Account_Annual_Info__r.Cropping__Account__c from Cropping__Crop_Record__c ' +
'Where Cropping__Account_Annual_Info__r.Cropping__Year__c = \'' + filterYear + '\' ' ;
Boolean isFirstC = true;

if(filterCrops !=null){
strCropQuery += (isFirstC?' AND ( ': ' Or');
strCropQuery += ' (Cropping__Crop__c = \''+ filterCrops + '\' ';
isFirstC = false;
checkCropCriteria = true;
Integer iCropAreaFrom = filterCropAreaFrom==null?0:filterCropAreaFrom;
Integer iCropAreaTo = (filterCropAreaTo==0 || filterCropAreaTo==null)?99999999:filterCropAreaTo;
strCropQuery = strCropQuery + ' And Crop_Acreage__c >= ' + iCropAreaFrom +
' And Crop_Acreage__c <= ' + iCropAreaTo+') ';
system.debug('@@@cropQuery' + strCropQuery);
}

if(filterCrops1 !=null){
strCropQuery += (isFirstC?' AND ( ': ' Or');
strCropQuery += ' (Cropping__Crop__c = \''+ filterCrops1 + '\' ';
isFirstC = false;
checkCropCriteria = true;
Integer iCropAreaFrom1 = filterCropAreaFrom1==null?0:filterCropAreaFrom1;
Integer iCropAreaTo1 = (filterCropAreaTo1==0 || filterCropAreaTo1==null)?99999999:filterCropAreaTo1;
strCropQuery = strCropQuery + ' And Crop_Acreage__c >= ' + iCropAreaFrom1 +
' And Crop_Acreage__c <= ' + iCropAreaTo1+') ';
system.debug('@@@cropQuery1' + strCropQuery);
}
if(filterCrops2 !=null){
strCropQuery += (isFirstC?' AND ( ': ' Or');
strCropQuery += ' (Cropping__Crop__c = \''+ filterCrops2 + '\' ';
isFirstC = false;
checkCropCriteria = true;
Integer iCropAreaFrom2 = filterCropAreaFrom2==null?0:filterCropAreaFrom2;
Integer iCropAreaTo2 = (filterCropAreaTo2==0 || filterCropAreaTo2==null)?99999999:filterCropAreaTo2;
strCropQuery = strCropQuery + ' And Crop_Acreage__c >= ' + iCropAreaFrom2 +
' And Crop_Acreage__c <= ' + iCropAreaTo2+') ';
system.debug('@@@cropQuery2'+strCropQuery);
}
strCropQuery += ' ) ';
System.debug('@@@strCropQueryFinal ' + strCropQuery);
if(checkCropCriteria){
for(Cropping__Crop_Record__c cr : Database.query(strCropQuery)){
accountIdsFromCrops.add(cr.Cropping__Account_Annual_Info__r.Cropping__Account__c);
}
}
System.debug('@@@accountIdsFromCrops ' + accountIdsFromCrops);

if(filterValueSegmentation !=null){
for(Cropping__Account_Annual_Info__c aai : [ select Cropping__Account__c
from Cropping__Account_Annual_Info__c
WHERE Final_Segmentation__c = :filterValueSegmentation
And Cropping__Year__c = :filterYear ]){
accountIdsFromValue.add(aai.Cropping__Account__c);
}
checkValueSegmentation = true;
}

strProQuery = 'select Opportunity.AccountId FROM OpportunityLineItem ' +
'WHERE oppBase__Opportunity_Name__c = \'' + filterYear + '\' ';
Boolean isFirstP = true;

if (filterOppProducts !=null){
strProQuery += (isFirstP?' AND ( ': ' Or');
strProQuery += ' (PricebookEntry.Product2Id = \'' + filterOppProducts + '\' ';
checkProductCriteria = true;
isFirstP = false;
Integer ifilterQuantityFrom = filterQuantityFrom==null?0:filterQuantityFrom;
Integer ifilterQuantityTo = (filterQuantityTo==0 || filterQuantityTo==null)?99999999:filterQuantityTo;
strProQuery += ' AND oppBase__Quantity_Dup__c >= ' + ifilterQuantityFrom +
' AND oppBase__Quantity_Dup__c <= ' + ifilterQuantityTo +') ';

}

if (filterOppProducts1 !=null){
strProQuery += (isFirstP?' AND ( ': ' Or');
strProQuery += ' (PricebookEntry.Product2Id = \'' + filterOppProducts1 + '\' ';
checkProductCriteria = true;
isFirstP = false;
Integer ifilterQuantityFrom1 = filterQuantityFrom1==null?0:filterQuantityFrom1;
Integer ifilterQuantityTo1 = (filterQuantityTo1==0 || filterQuantityTo1==null)?99999999:filterQuantityTo1;
strProQuery += ' AND oppBase__Quantity_Dup__c >= ' + ifilterQuantityFrom1 +
' AND oppBase__Quantity_Dup__c <= ' + ifilterQuantityTo1 +') ';
}

if (filterOppProducts2 !=null){
strProQuery += (isFirstP?' AND ( ': ' Or');
strProQuery += ' (PricebookEntry.Product2Id = \'' + filterOppProducts2 + '\' ';
checkProductCriteria = true;
isFirstP = false;
Integer ifilterQuantityFrom2 = filterQuantityFrom2==null?0:filterQuantityFrom2;
Integer ifilterQuantityTo2 = (filterQuantityTo2==0 || filterQuantityTo2==null)?99999999:filterQuantityTo2;
strProQuery += ' AND oppBase__Quantity_Dup__c >= ' + ifilterQuantityFrom2 +
' AND oppBase__Quantity_Dup__c <= ' + ifilterQuantityTo2 +') ';
}
strProQuery += ' ) ';
system.debug('@@@strProQuery '+ strProQuery );
if(checkProductCriteria){
for (OpportunityLineItem oli : Database.query(strProQuery)){
accountIdsFromProducts.add(oli.Opportunity.AccountId);
}
}
}
}
if (checkPartner) {
strAccQuery += ' AND Id = :accountIdsFromPartner ';
}

if (checkAttribute){
strAccQuery += ' AND Id = :accountIdsFromAttribute ';
}

if(checkValueSegmentation){
strAccQuery += ' AND Id = :accountIdsFromValue ';
}

if(checkCropCriteria || checkProductCriteria) {

strAccQuery += ' AND (Id = :accountIdsFromCrops OR Id = :accountIdsFromProducts ) ';
}

for(CampaignMember cm : [SELECT ContactId FROM CampaignMember WHERE CampaignId = :strCampaignId])
existingCampaignMembers.add(cm.ContactId);

String strCamMemQuery;
String strCamMemCountQuery;
String strQuery;
String strContactRoleQuery;
String strContactList;

//Querying all the account id's
System.debug('@@@account query'+strAccQuery);
for(Account a:Database.query(strAccQuery)){
acts.add(a.Id);
}
system.debug('@@@Total accounts'+acts.size());

//Query to extract all the contact id's from Contact roles
strContactRoleQuery='Select ContactId FROM AccountContactRole where AccountId IN :acts ';
system.debug('@@@strContactRoleQuery'+strContactRoleQuery);
RoleQuery = strContactRoleQuery;

strCamMemQuery = 'SELECT Id,Name,LastName,Initials__c,AccountId,Email ';
strCamMemCountQuery = 'SELECT count()';
strQuery=' FROM Contact WHERE Id NOT IN :existingCampaignMembers ';
strQuery+='AND AccountId IN:acts ';
//strQuery += 'AND ( AccountId IN :acts ';
//strQuery +='OR Id IN :contacts)';
if(filterContactType!=null){
strQuery += ' AND RecordTypeId = \'' + filterContactType + '\' ';
}
system.debug('@@@strQuery ' + strQuery);

if(filterCropInterest<> null && filterCropInterest.size()>0 && filterCropsCon <> null && filterCropsCon.size()>0){
String strCropIntQuery='';
strCropIntQuery = 'select Contact__c from Crop_Information__c where Crop_Interest__c = :filterCropInterest AND Crop__c = :filterCropsCon ';
strQuery += ' AND Id IN (' + strCropIntQuery + ') ';

}
system.debug('@@@strQueryafter crop interest' + strQuery);
if(filterCommunicationOptOut.size()>0) {
Set<String> coo = new Set<String>();
for(String str : filterCommunicationOptOut)
coo.add(str);
String q='';
if(coo.contains('Memail')) {
q = ' AND Do_not_use_marketing_email__c = false ';
}
if(coo.contains('Pemail')) {
q += ' AND Do_not_use_personal_email__c = false ';
}
if(coo.contains('Sms')){
q += ' AND Do_not_use_SMS__c = false ';
}
if(coo.contains('Phone')) {
q += ' AND Do_not_use_Phone__c = false ';
}
if(coo.contains('DMail')) {
q += ' AND Do_not_use_Direct_Mail__c = false ';
}
strQuery += q;
}
if(filterEmail){
strQuery += ' AND Email != null ';
}
//Adding Phone attribute
if(filterPhone){
strQuery += ' AND MobilePhone != null ';
}

Boolean checkConAttribute = false;
set<Id> contactIdsFromConAttribute = new set<Id>();
if(conattFilter.Contact_Attribute_Name__c !=null ){
strConAttQuery = ' SELECT Contact__c FROM Contact_Attribute__c WHERE Contact_Attribute_Name__c = \''+ conattFilter.Contact_Attribute_Name__c +'\' ';
if(conattFilter.Contact_Attribute_Value__c !=null){
String str = '';
for (String s : conattFilter.Contact_Attribute_Value__c.split(';',0)){
str += '\'' + s + '\',';
}
str = str.substring (0,str.length() -1);
strConAttQuery += ' AND Contact_Attribute_Value__c includes (' + str + ') ';

}
for (Contact_Attribute__c att : Database.query(strConAttQuery)) {
contactIdsFromConAttribute.add(att.Contact__c);
}
checkConAttribute = true;
}

if(checkConAttribute){
strQuery += ' AND Id = :contactIdsFromConAttribute ';
}

if(conFilter.Language__c !=null){
strQuery += ' AND Language__c = \'' + conFilter.Language__c +'\' ';
}

System.debug('@@@strQueryFinal' + strQuery);

strCamMemCountQuery += strQuery + ' limit 5000';
strCamMemQuery += strQuery;
pQuery = strCamMemQuery;
strCamMemQuery += ' LIMIT 5000';

Set<Id> conRoles=new Set<Id>();
for(AccountContactRole c:Database.query(RoleQuery)){
conRoles.add(c.ContactId);
}
List<Contact> ContactFromRoles = [select Id,Name,LastName,Initials__c,AccountId,Email from Contact where Id IN:conRoles];

system.debug('@@@QUERY-----------'+strCamMemQuery);
List<Contact> cl = Database.query(strCamMemQuery);
if(ContactFromRoles.size()>0){
for(Contact cr : ContactFromRoles){
cl.Add(cr);
}
}

if (cl.size() <= 1000)
contactsList = cl;
else {
for (Integer i = 0; i < 1000; i++) {
contactsList.add(cl[i]);
}
}
resultSize = cl.size();
if (resultSize == 0) {
noContactsFound = true;
ApexPages.addMessage(new ApexPages.Message(ApexPages.severity.ERROR, 'No contacts found'));
}
system.debug('@@@contact List----------'+contactsList);
}
}