The search function has always been quirky, and with a five minute wait between searches it’s important to get it right. So it’s frustrating not to be able to find an old thread that you KNOW is in there somewhere, often because you yourself started it. If a search fails to yield results, what’s to do?
I’d join in here, if I were you.
If it’s a thread you started (or responded to), why not start in “Subscribed Threads”? I believe you are automatically subscribed to any thread you post to. That might save you some search frustration.
I had that turned off for some reason, just reenabled it.