If you are not citizens of visa exemption countries or if you are but wish to stay in Vietnam longer, then you need to apply for the visa before entering Vietnam.
Visiting the closest Vietnamese Embassy/Consulate in your country to apply for the visa if you need a visa stamped onto your passport before arriving in Vietnam. It will be required filling forms, ID photo, and the visa fee. They also keep your passport for a few days to check your information and stamp it.
Continue Vietnam Visa Exemption programs for 5 Western European countries until 30 June 2021. Vietnam government has decided to extend the visa waivers program for visitors from the United Kingdom, Germany, France, Italy, and Spain.
It is informed by the Vietnamese government that overseas Vietnamese in the US, as well as all overseas Vietnamese in more than 90 countries around the world who meet some conditions, are accepted to be for five-year Vietnam visa exemption.