South Georgia
At present, there is no information about the Embassy of Vietnam in South Georgia.
If you are holding a South Georgia passport or citizen of other countries currently living in South Georgia, you can apply Vietnam visa online through this form:
http://www.vietnamvisacentre.com/apply-online
It takes 01 business days to get an approval letter via email. Once you have the visa approval letter, you can get a visa at airport when you arrive in Vietnam.
Embassy of Vietnam in other countries