Im asian and know VN , lived there.
Some things are true but not fair.
First some vietnamese are old fashion, but mostly parents and grand parents.
The new generation nowadays is very near the occident culture. My ex g/f is 30 is not married, she has indeed pressure from her family "why are you not married".
That's true.
BUT, she does not care. And many girls do not care now. Many told me, they prefer to be married later on with a good guy than being married and unhappy.
Vietnamese meets many foreigners now and they are aware of what it is in other part of world.
another thing, don't expect a country who had known the war for many years (against japanese, french, usa) to change so fast. A country never changes like that. It needs time.
and don't think that girls only want sex and money, that's very wrong and not fair to them. I dated 3 girls, we broke up and are still freinds.
They give me ride, they help me if I have some administration problems, etc without asking me anything.
They are human being you know...not sex/money machine.
Of course depends where you. If you date hookers, that's your problem.
btw, I can say many stories about foreigners acting badly in VN...just because they feel "superior". They just want to f**** many girls in same time.