- A single entry visa allows you enter/ exit Vietnam 1 time or it is also called visa with single use. Once your single entry visa used, you can not entering again Vietnam with this used visa. You must apply for the new one if you want to come back Vietnam again. For example, with 1 month single entry visa, you can enter Vietnam stay for less than 30days. You can not re-enter Vietnam if you exit Vietnam after 10days staying, even your visa valid for 30days.

- A multiple entry visa allows you enter / exit Vietnam unlimited times as long as your visa still valid. Your multiple entries visa must be picked at the airport when you arrive. After getting your multiple entries visa at the airport, you can exit & re-entering Vietnam at any port s you want.