Can I know the database that the site was based on in the search? Or even search algorithm?

Unfortunately, I tried searching for my country, "United Arab Emirates". The results of the research were similar to other countries and ignored famous exchange platforms like Rain & BitOasis.
So update your database will and the search engine "I need to write full name of country."

The rest of the pages need a lot of development, but the most important is the research database.

I can add more later.