Search function is not working properly. You can try using Google search and put site:bitcointalk.org after whatever you try to search.
If you could see my face you'd probably ask if I was rolling my eyes and laughing at you, but I'm not. It's just so awful that one has to do what you described in order to search the forum--and I know damn well what you say is true; the search function is and has been broken for a long time now.
It's not just that most results are old or in random order or are only tangentially related to what you searched for, but it takes f-o-r-e-v-e-r to search, to add names to your PM blocked list, to find members, and probably other things I'm not thinking of. While it's true that I like the old-school vibe to the forum, it's the appearance I'm talking about and
not the functionality.
This has to be a case of Theymos not wanting anyone to help out, right? This is a forum that's jam-packed with very talented coders who'd probably love to improve stuff like this....and yet basic things are just broken for years and neglected for so long that everyone just accepts it as normal. The first step is admitting you have a problem, Theymos. I say that out of love, brah.