Our main search engine rarely works. Never has. So, I've developed a collection of workarounds and published them in the FAQ (and this thread).
If you click on your name in any message you've posted, you'll get to a list of all the messages you've posted.
On the far right of the main forum page, you will find links to trace each thread. If you click on the trace link, it will be listed on your personal page. But I've never found much use for the tracer.
Now, the main search engine I use for searching by Thread Name is the Filter at the top of the list of threads. Put one word or phrase from the thread title in the Filter box, and set the age back to "all" (or whatever). Click "refresh" and there ya go. It takes a little practice, but all of our search methods are pretty simple. It's just that our most obvious search engine doesn't work.

Joe