public with sharing class AccountSearchController {
    public String searchText {get; set;}
    public List<Account> accList{get; set;}
    public PageReference doSearch(){
        List<List<sobject>> records =[FIND :searchText
                                     RETURNING Account(Name, Site, Rating)];
       accList = records[0];
        return null;
    }

}

<apex:component controller="AccountSearchController">
    <apex:form >
    <apex:pageBlock title="Account Search Page">
        <apex:pageBlockSection title="Search String">
            <apex:inputText label="Search Text" value="{!searchText}"/>
            <apex:commandButton value="Search" action="{!doSearch}" reRender="rs"/>
        </apex:pageBlockSection>
        <apex:pageBlockSection title="Search Result" id="rs">
            <apex:pageBlockTable value="{!accList}" var="acc">
                <apex:column value="{! acc.Name}"/>
                <apex:column value="{! acc.Site}"/>
                <apex:column value="{! acc.Rating}" />
            </apex:pageBlockTable>
        </apex:pageBlockSection>
      </apex:pageBlock>
    </apex:form>
</apex:component>