It's not broken, that's sadly how XenForo works by default the search it's no "title or text" search, it's a keyword search and each keyword has to be 3 characters minimum.
So stripping some words like "in, of" should let you search for mentioned keywords, there are some tricks though:
https://xenforo.com/community/threads/how-to-use-search.178600/#post-1416575 the search is still limited, it requires some addtional addons.
Meanwhile you could type "get xyz in front of site:ugbase.eu" into google too.
Seems like yes, gotta have to look into this.
Gotta look into that too, seem to get stripped by some anti sqli filters.
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