The problem with search is, that people would have to know what they search for. By name.
And assets typcially do not have a name. Not in the sense that games have a name.
So those items have pseudo names that are actually the topics they are meant for. Or qualities they have.
Applying any type of name search for assets is therefore besides the point and will not work. The algorithm tries to put a name relevance on items that do not have names at all. Of course it does not work.
Tags and search with regular internet search engines will give far better results.
But as this comes up every now and then, from developers of said assets, how are the people looking for assets do it? Do they use the search bar? And if not, how did they learn that is is useless for searching assets.
Actually, the search bar does not even indicate that it searches for assets. It reads: search for games and creators ;-)