Can spotlight search iMessages??

Right so spotlight search/messages app search box will literally find sms messages from a year an half ago no problem but whenever it comes to imessage unless its within the last month/ couple of weeks spotlight search will not locate any iMessages further in the past than that. Ive even tried doing a search pressing the search button and waiting to see if there's any sort of delay but nothing. It's not a major problem I can live with this but just bugs me like how yea text all your friends with samsungs and locate them texts whenever you want but if they have an iphone your never seeing them texts again! Haha stupid logic! Any suggestions welcome thanks