For Vietnamese overseas, you have 2 choices

– If you are Vietnamese origin , you are eligible for the 5 year visa exemption. Since Vietnamese government is the only agent who has authority to issue this visa exemption certificate, you will need to contact them for help, happily you can do it online here:

http://mienthithucvk.mofa.gov.vn/Default.aspx?alias=mienthithucvk.mofa.gov.vn/en

– If you want to save time, you also can apply for visa online with us.