I don't receive any ads despite i had enable ads in setting

are you based in the us,canada, uk, germany or france

no , i from vietnamese

Copying the answer I gave to the same problem in a different Post:

That “solves” the problem then. I’m sorry but you can’t receive ads at the moment, they are working on expanding the program to more countries.

An answer to that could have been found in the Brave Ads FAQs.