//VF Page
<apex:page controller="SearchAllCntrlr" >

<apex:form >
<apex:pageMessage summary=" <b>{!qc}</b> " severity="Confirm" strength="3" rendered="{!IF((acl.size>0)||(acu.size>0),true,false)}"  escape="false"/>
<apex:pageBlock title="Search Keyword">
 <apex:inputText value="{!Qstring}" label="Input" />   
  <apex:commandButton value="Search records" action="{!search}" /><br></br><br></br>
  Eg: Anil 
   </apex:pageBlock>
   <apex:pageBlock title="Account Result" rendered="{!acl.size!=0}">  
    <apex:pageblockTable value="{!acl}" var="a"  >  
     <apex:column HeaderValue="Accounts">  
      <!--<apex:outputlink value="https://ap1.salesforce.com/{!a.id}">{!a.Name}</apex:outputlink>-->
      
      <apex:commandLink action="{!openAc}">
      <apex:param name="SelectedId" assignTo="{!selectedId}" value="{!a.id}"/>{!a.name}</apex:commandlink>
      </apex:column>
      
      
     <apex:column value="{!a.id}"/>  
    </apex:pageBlockTable>     
   </apex:pageBlock>
   
   <apex:pageBlock title="Contact Result" rendered="{!acu.size!=0}">
   <apex:pageblockTable value="{!acu}" var="b">
   <apex:column headerValue="Contacts">
   <apex:commandLink action="{!Openco}">
   <apex:param name="SelectedC" value="{!b.id}" assignTo="{!SelectedCC}"/>{!b.name}</apex:commandlink>
   </apex:column>
   </apex:pageblockTable>
   </apex:pageblock>
   
  
<apex:pageMessages escape="false"/>
  </apex:form> 

</apex:page>



________________

//CONTROLLER

public class SearchAllCntrlr 
{
public string SelectedId{get;set;}
public string selectedcc{get;set;}
public list<account> acl{get;set;}
public list<contact> acu{get;set;}
public string queri,queriC;
public string qc{get;set;}
public string Qstring{get;set;}

public string getqcp()
{
if(Qstring=='')
{
qc = 'You are viewing all Contacts and Accounts';
}
else { qc='Search Results for <b>"'+qstring+' "</b>';}
return qc;
}


public void search()
{
ASearch();
CSearch();

if(Qstring=='')
{
apexpages.Message msa = new Apexpages.Message(ApexPages.Severity.Confirm,'<b>You are Viewing All Accounts and Contacts</b> ');
        apexpages.addmessage(msa);  
}

if(acu.size()==0&&acl.size()==0)
{
apexpages.Message msa = new Apexpages.Message(ApexPages.Severity.FATAL,'There were no Results found  for <b> "'+qstring+' " </b> ');
        apexpages.addmessage(msa);  
}
else if(acl.size()==0)
{
 apexpages.Message msg = new Apexpages.Message(ApexPages.Severity.Info,'There were no Results found on Accounts for <b>"'+qstring+' "</b>  ');
        apexpages.addmessage(msg);  

}
else if(acu.size()==0)
{
 apexpages.Message msg = new Apexpages.Message(ApexPages.Severity.Info,'There were no Results found on Contacts for <b> "'+qstring+' " </b> ');
        apexpages.addmessage(msg);  

}

}
public SearchAllCntrlr()
{
//displ=true;
acl = new list<account>();
acu = new list<contact>();

}



public void ASearch()
{
queri = 'Select name from account where name like \'%'+Qstring+'%\' limit 50';
acl = database.query(queri );


}

public void CSearch()
{
queriC = 'Select name from Contact where name like \'%'+Qstring+'%\' limit 50';
acu = database.query(queriC);


}

public pagereference OpenAc()
{

pagereference pgs = new pagereference('/' +SelectedId);
pgs.setRedirect(true);
return pgs;

}

public pagereference OpenCo()
{
return new pagereference('/'+Selectedcc);
}


}