As I mentioned in
a thread about a different search issue, it appears that the Forum search (as opposed to the Google search at the top of the page) will give you all threads that match
any word of four or more letters in your search, so in this case it will return everything containing "Uher" and ignore "CR" and "240". if you were to search for "Uher CR240", it would give you all threads containing either "Uher" or "CR240".
If there's a way to search only for threads containing
both "Uher" and "CR240", I'd be interested to know.