It took me some time to actually figure out the difference between the Google search and the Forum search, with the help of some few guides I saw. so you'd expect those newbie's who didn't even bother to read the forum rules and regulations to start reading guide on how to use search.
By the way I don't think it's only newbie's that make this error even higher ranked members are also guilty of creating threads to ask questions that has already been asked several times in the forum, but not like the newbie's though.
In addition to google search and internal forum search, there is another alternative that you can try: Ninjastic.space
It's a post archive and search engine made by TryNinja and you can find more information here: Ninjastic.space - BitcoinTalk Post/Address archive + API