It'll do it all your computers. It's an annoying feature of the search. I was looking into it last night with the tyre issue (you cannot search for tyre either!)
Basically, the board decides that some words are common and meaningless in a search as they will return too many results. I need to work out what it makes the assumptions on and change it. Clearly being a 4x4 forum we need things like tyre and morocco to work
While its getting sorted type your search term into google and then type site:landcruiserclub.net after it. Google will restrict the search to this site. You cant search by categories etc but it work better than the site search tool ATM.