Hi Eric,

You can use the below code for your requirement, it will work fine for all objects , you just need to add objects to the List.

Just create a new VF Page and copy paste the code. it will work fine.

VF Page:

<apex:page controller="searchrecords">
  <apex:form >

   <apex:PageBlock title="">
    <center>
          <b> Enter text to search: </b> &nbsp;&nbsp;<apex:inputText Title="Select Type" value="{!searchtext}" /> &nbsp;&nbsp;&nbsp;
            <apex:commandButton id="searchStatus" value="Search" action="{!search}"/>&nbsp;&nbsp;   <apex:commandButton value="Clear Filter" action="{!clearFilter}" />&nbsp;&nbsp;<!--<a href="javascript:showhide('hideShow')">Advanced Search</a> --> 
    &nbsp;&nbsp;&nbsp;    <apex:Messages style="color:rgb(204,0,0);font-weight: bold;text-align:center" /> &nbsp;&nbsp;&nbsp; <apex:outputText value="{!dispMessage} " style="font-weight:bold;Font-size:12px;color:Green;"></apex:outputText></center><br/><br/><br/>
  
         <apex:pageBlockTable value="{!searchResults}" rendered="{!searchResults.size > 0}" var="Usr" style="width:100%; height:12px;" rows="1500">
                 <apex:column headerClass="">
                        <apex:facet name="header">Object</apex:facet>
                         <apex:outputText value="{!Usr.sObjectTypeName}"/>
                </apex:column>
          <apex:column headerClass="">
                        <apex:facet name="header">Name</apex:facet>
                         <apex:outputLink Value="/{!Usr.record['Id']}" >
                         <apex:outputText value="{!Usr.record['Name']}"/></apex:outputLink>
                </apex:column>
                <apex:column headerClass="">
                        <apex:facet name="header">Created By</apex:facet>
                         <apex:outputLink Value="/{!Usr.record['CreatedbyId']}" >
                         <apex:outputText value="{!Usr.record['Createdby.Name']}"/></apex:outputLink>
                </apex:column>
                 <apex:column headerClass="">
                        <apex:facet name="header">Created date</apex:facet>
                         <apex:outputText value="{!Usr.record['Createddate']}"/>
                </apex:column>
                <apex:column headerClass="">
                        <apex:facet name="header">Last Modified By</apex:facet>
                         <apex:outputLink Value="/{!Usr.record['LastmodifiedbyId']}" >
                         <apex:outputText value="{!Usr.record['Lastmodifiedby.Name']}"/></apex:outputLink>
                </apex:column>
                 <apex:column headerClass="">
                        <apex:facet name="header">Last Modified date</apex:facet>
                         <apex:outputText value="{!Usr.record['Lastmodifieddate']}"/>
                </apex:column>
</apex:pageBlockTable>


     </apex:PageBlock>
</apex:form>

</apex:page>


Class :

public with sharing class searchrecords {


public string searchtext{get; set;}
public string dispMessage{get; set;}
public list<list<sobject>> searchList{get; set;}
Public List<String> searchObjList{get;set;}
Public string searchquery{get; set;}
public string Objectstr{get; set;}
public string dispObjectstr{get; set;}

public searchrecords()
{
    searchObjList = new List<String>();
    Objectstr = '';
    dispObjectstr = '';
 
}


public pagereference search(){
    if(searchtext != null && searchtext.length() > 1){
        Objectstr = '';
        dispObjectstr = '';
    // Construct the search SOSL Query
      list<string> gd = new List<string>();
      gd.add('Opportunity');
      //gd.add('Quote');
     
       
            for(String s:gd){
              
                    Objectstr += s+'(id,Name,createdby.Name,lastmodifiedby.Name,createdbyId,lastmodifiedbyId,CreatedDate,lastmodifieddate),\n';
                    dispObjectstr  += s+'\n';
                   
               
            }
            system.debug('Objectstr---->'+Objectstr);
            Objectstr = Objectstr.substring(0,Objectstr.length()-2);
            searchquery='FIND \'' +searchtext+'*\' IN ALL FIELDS RETURNING '+Objectstr;
            searchList = new List<List<SObject>>();
            try{
                    searchList = search.query(searchquery);
                    if(searchResults.size() == 1)
                    dispMessage = searchResults.size()+' Record found!';
                    else
                    dispMessage = searchResults.size()+' Records found!';
                }
            catch(system.queryException ex)
            {
                 ApexPages.addMessage(new ApexPages.Message(ApexPages.SEVERITY.Warning,'Database Query error...'+ex));
            }
       
       
    }
    else
    {
         ApexPages.addMessage(new ApexPages.Message(ApexPages.SEVERITY.Warning,'Please enter minimum two characters to search.'));
    }
   
   
    return null;
}


public class searchResultRow{
        public string sObjectTypeName {get;set;}
        public sObject record {get;set;}
       
        public searchResultRow(sObject pObject) {
            record = pObject;
            sObjectTypeName = pObject.getSObjectType().getDescribe().getLabel();
        }
    } 
   
    public list<searchResultRow> searchResults {
        get {
            searchResults = new list<searchResultRow>();
            if(searchList != null) {
                for(list<sObject> objectList : searchList) {
                    for(sObject obj : objectList) {
                        searchResults.add(new searchResultRow(obj));
                    }
                }
            }
            return searchResults;
        }
        set;
    }
   


   
    public void clearFilter(){
        searchtext ='';
        dispMessage = '';
    }

}



For Some reason Quote is not supporting..  you can modify the code as per your needs.

If this code helps you , please mark this as solution.