What should I do if my name on the DTV application does not match my bank statements, and do I need to apply from Ho Chi Minh or Hanoi?

Hi people! First off Merry Christmas!🎄

I have a few questions.

Im a Swedish citizen who just left Thailand and currently in Da Nang to apply for my DTV.

Question one :

My passport states 4 names as my Given Names/Förnamn. (Example : Jon I Lars Fred Larsson)

But in Sweden I only go by one of them Lars, so technically the others are my “middle names”. But the name I go by is not the first one of the 4 names, it’s the 3rd. That’s where it gets tricky. But all my bank cards, credit cards and when I log on to my net bank state (example : Lars Larsson). How do I go about this? Should I separate it into first and middle names? Or maybe explain this in a separate letter?

Question two :

I could only choose to apply via the Hanoi or Ho Chi Minh embassy. But since it’s all digital do I need to be in any of these two city’s or am I good on Da Nang?

Many Thanks 🙏