The old forum search doesn't search in role playing, offtopic and community projects. When feeding sentences from recent topics into it I get results for all public forums but those.

All three forums have an index above 10.. maybe that has something to do with it.

I know there's the google search, but that doesn't seem to work well for older things.

It also doesn't search the PCC stuff. :(

Perhaps it was because the devs changed the indexes of the rp/ot/cp forums a while back and never changed the search function to match.

Though the PCC should be included if you are a member.

I think he meant that the google search doesn't cover PCC (since google is not a member).

Nah the normal search function doesn't search the PCC forum.

Correct.
I don't expect a private forum to show up on Google.