Lots of scams when you’re in a poor country or any poor areas even in developed countries although not as common.
I don’t stand out bc I speak vnmese. I also don’t dress like a tourist. If you are a woman, don’t wear shorts or super trendy clothes unless you’re a young 20 something. That screams tourist. Don’t wear sun glasses either. You don’t have to wear dreadful pajamas. thin cargo pants or cool linen in neutral colors will do. Don a non la and you are golden. Key is if you speak enough vnmese even when you’re not familiar with the lingo, people don’t mind explaining it to you and are less likely to scam you.
The country side are not scammy. Even the Malay girl didn’t get scammed there.
I have some fond memory walking to the market in the country. Some lady I didn’t even know called out to me “are you so and sos daughter?” Knew my mom apparently.
Vietnam is a crappy country bc of peasant commie leaders but to be fair, there are many nice people there if you know how to present yourself.