This site's search feature has been bad since it originally went live...its not this site's fault specifically, as the site search is a built in adapter with Vbulletin...and no site's using this functionality are any good at it...
but, as far as mazdas247 specifically...its a combination of the above...as well as users posting new threads when there are already thousands in place related to mostly the same thing...not only that, the original 'question' by the original poster gets ignored...or they don't return to say if the feedback helped or not, and it just dead ends...in which case, the next user posts the same thing all over again...
but yeah, google is far superior at finding strings more relevant to a specific group of words...Vbulletin's search just attaches itself to the exact word you type...not any type of 'learning' to make results at all specific...