Search function not working properly

[Terramex]

Some key words don't bring any result at all, e.g. try please

Further, when browsing all posts of a user only the last 500 posts are shown.

[Blazkowicz]

That example contains words which are very common, therefore search engine ignores them.
Also you can search for them directly if you put the word into two *

[Terramex]

Okay, *please* brings 3 results.
I can't believe the community is that impolite

Regarless of my maybe unsuitable example there seem to be topics i just
can't find anymore though using key words that worked before.

[Sway]

I'll investigate this problem.

[A.Hecka]

Any results yet? Because of the buggy searchengine I guess the rumours of deleted threads came up because the searchfunction was not able to bring some threads back to light again.

[Sway]

I think it's the old problem. At least it already occured about two months ago. I'm trying to find solution.

Terramex, please make some examples, which worked correctly before.