Yea I went with my friend last Christmas and New year time span so the 4 days was the actual work days but it was close to a week to get it done.

I got a friend approved in Hanoi within like 4 days so as long as you give exactly what they ask for then you shouldn't get rejected.

Your going for the soft power dtv so as long as you can find a qualified school and they agree then you can apply. I think you are referring to Denang Vietnam which falls under the Ho Chi Man consulate so look at what they require and you have to be outside of Thailand to apply. There is no 100% way to say you will definitely get the visa. Just provide them with what they ask for then you should be good. Good Luck 👍

Been in and out several times never asked. Came in through Don Mieng and the big airport in Bkk

No