The e-visa of Vietnam will let you stay in the country for a maximum of 30 days. It’s a single entry. If you plan to stay in Vietnam for more than 30 days, you are advised to choose visa on arrival for getting 3-month or 6-month visa.
If you already in Vietnam with an e-visa for 30 days and you want to stay more, see How To Get My E-visa Extended?
When applying for the Vietnam e-visa, you will be asked to enter your personal information. This includes your complete name, date of birth, nationality, and some relevant details from your passport.
There are 2 options to get your e-visa extended as below: Do It Yourself : Download Form NA5 for visa extension fill, sign then bring it to your embassy or consulate to ask for sponsoring. Ask your hotel or host for the Temporary residence declaration.