Use your favorite search engine instead of the internal search feature -- I like webferret, but suit yourself. Use the search terms bladeforums and O1 and you will find web pages with both those words in them ... I got 41 hits in a few seconds. Several of them are not at bladeforums.com -- that's unusual -- but they include the word bladeforums, so they're probably worth looking at.
I got in the habit of using webferret to search bladeforums when we were still using UBB and the search function was unreliable as well as limited. Even with the new software it's still somewhat limited; it can't handle boolean logic -- other search engines can.