Even though the title is the same in the site search, no results are found

I opened a topic like this before. What I actually want is more relevant and logical search results. Artificial intelligence does this job wonderfully, but unfortunately no results can be found in the normal site search. For example, I type the words in the title and it says no results found, but it comes up first in the search for artificial intelligence.

Searched word: devletin iki bölüm halinde yönelmesine
Topic title on the site: İlk Türk devletlerinde, devletin iki bölüm halinde yönetilmesine ne denir?

There are no results in the site search, but there are in the artificial intelligence search:

Normal search result not found: