All tagged how to get a visa
Visitors to Vietnam from most countries are required to have a valid Vietnamese visa in their passport before arrival. This should be arranged in advance. If you are already traveling in Southeast Asia, the Vietnamese embassies in Bangkok or Phnom Penh are the quickest and most reliable places to secure a visa.
Before you go on your trip to Cambodia, make sure that you have the proper visa! Citizens of most countries can apply for a visa-upon-arrival at any of Cambodia’s international airports and most border crossings. If you want to save time at the airport, skip the lines by applying for a Cambodian evisa in advance.