I routinely find that the "questions that may already have your answer" list when I am writing a question is a significantly better searching tool than the search bar. For instance, just now I searched for "non-noetherian ring with noetherian zariski topology" in the search bar and got three rather unhelpful results. However, when I go to ask a question with that title, the second result I get is precisely the question I want.
Is there an explanation or deliberate reason for this? Why don't we just use the algorithm for the "questions that may already have your answer" feature for the search bar. I can imagine a situation where someone has a question, looks for it using the search bar and can't find the answer. He/she then posts the question without paying too much attention to the "questions that may already have your answer" since he/she has already searched for an answer and ends up posting a repeat that wastes everyone's time.