I’m a Hong Kong citizen with a British National (Overseas) Passport. What should I type in the nationality filed during the application process? Either Hong Kong or Great Britain? As there is no choice for BNO. Best regards, Chan.
Please be advised that you should enter United Kingdom as your nationality since you bring British passport.
Here is the link to apply for your visa to Vietnam online: https://booking.vietnam-visa.com/step1.html.