There is NO Embassy of Denmark in Da Nang City, Vietnam.
Instead, do you want to find the Danish Economic and Commercial Office in HCMC or Embassy of Denmark in Hanoi ?
You’d be glad to know that there is not a lot of requirements that you need to comply with when applying for the e-visa. Denmark nationals who wish to apply for the Vietnam e-visa should prepare the following: Passport – you should have your Denmark passport ready.
The Vietnam e-visa is basically an online version of the Vietnam visa. But instead of going through the traditional process of applying from a Vietnam embassy, this visa will simply require you to go online.