You've really done nothing wrong. There, don't you feel better now?
The best way to find something in a directory is to browse through the categories until you find the right cat, then you can see the sites that match that cat.
While we do have a very simple search function, it works about as well as pigs fly. It was not really designed for end users to search for listing, but rather for editors to help find the correct categories to stick stuff. It is, on occastion, somewhat adequate for that task.
A lot of people (including bunches of editors) have been caught using the Google search function. There is a way to restrict your search by domain (dmoz.org) and rather than just telling you how to do it, I'll let you enjoy the thrill of discovery on your own.
Hope that helps.