I used the Contact Us at the bottom and heard back from a forum admin who suggested I search on
concert and band
and restrict my search (using Advanced) to titles only, and that did bring up much less - can't say if it brought up everything that would have been relevant but I think it was an OK, if not ideal, solution. I just will have missed all the thread that started on another subject and ended up including concert band ...
Google is cool that way. You can actually put in search strings and then put in:
and it will only search there. I have used that on other sites where the search engine didn't exist or didn't work the way I wanted.
I've also seen some sites where they use Google for their searches, and give you a choice of "this site only" or "entire web" - that would work for me here.