We done cooking classes.....you need to go Thailand first, enroll in classes, get classes sign up letter confirmation, DBD documents that prove Muay Thai school is legit. You then need copy of Thai owners ID Card signed. Also need Thai bank account with 500,000thb in it. Then you go to Vietnam/Laos etc and apply online. You cannot apply for DTV in Thailand. Bloody long hard process. Stick to 60day tourist, visa extensions and border runs