UBB.threads PHP Forum Software Community Forums UBB.threads Version 7/8 Support Trouble finding some posts in search function

I tried updating the control panel settings to internal and 2+ characters...but it still won't find the words "IRA" or "tax." I know there are posts that meet this criteria but it just won't locate any. Same thing the FullText method did. Is there anything else I can do? Thanks for your help.