google search often returns wrong, unrelated, or no result. i have been in that situation many times before and moved on to change my query.
i am (and most of us are) trying to solve my own issue. not google's.
that's why you get vague answers to your questions. it's not because it doesn't happen. it's because at that moment we care much more about solving our problem. that's what brought us to google search in the first place.