If I am looking for something in the trade forum or even in the help area how do I do a search in it to find keywords from all the posts?

I don't understand the /jo room command at the top of the screen either.

If you have toriprime you can use this feature: http://forum.toribash.com/search.php
But since I guess you don't have it, the screen explaining why it isn't free probably pops up.

But that search method isn't always working great aswell, if you want a free searching method (which in my opinion works better) go to google and type "site:forum.toribash.com what you're looking for".