Yes, normally Search works reasonably well.
But just now, I was in the Hilton HHonors forum, did "Search this Forum," "Advanced," "Titles-only" on the keyword "Moscow".
(I KNOW there are a few threads on the Moscow Hilton in that forum, because I've found them before. And they DO have "Moscow" in the title.)
Tried it a few times, with a few variations -- such as "Search entire posts" instead of "Titles only" -- absolutely NO luck. NO results.
(Will look in the HHonors forum FAQ sticky next for Moscow Hilton, but just wanted report how seriously messed up Search is at the moment.)