I made my request 2 times for DTV with a muy Thai school, the first request to Ho Chi Minh was refused (I had returned to Thailand before the answer I did not know...). But I remade my application in Hanoi a few days ago, I have absolutely all the necessary documents and amount, but they still refused....without any explanation... I don't know what to do it's a lot of money for nothing. Do you have any advice?