I thought at the start of this year they changed the 6 air entries to only 2 per year I’m sure it was on this page I seen someone got turned away at the airport
Mine has done the same and I’ve been through multiple airports including Bangkok Phuket Pattaya and Chiangmai and it’s never caused me an issue, don’t know what it is that causes the problem maybe if they get damp or something
If you transfer from an international flight to a domestic one in Hanoi or Ho Chi Minh City, you must go through immigration and enter Vietnam. You must do this even if your final destination is outside Vietnam. This is also taken from the website
The only thing I can see is something about leaving before 10days of entering and you can enter again but I’m not sure if that refers to visa holders or visa exempt, I’m currently sitting on the plane waiting to taxi 😂 I’m hoping that if I can prove I’m leaving the same day it will be ok almost like a transit stop if you like