Have any questions about visas can be obtained at the airport. In the case of a multiple-entry visa requirement, you should be in or enough through each entry airport, if only for the very first time I come into the country by air, when I’ll travel through for my visa and other entry through the country travel on land? Thanks for your response!
With your approval letter, you have to enter Vietnam at one of four Vietnam International Airport: Tan Son Nhat- Ho Chi Minh, Noi Bai- Ha Noi, Cam Ranh or Da Nang for the first time to get Vietnam stamp visa. Then you can go out and come back by any transportation