I think we have determined that for Vietnam you must be originally from Vietnam. My partner carries a U.S. passport that says he was born in Saigon, Vietnam and speaks fluent English and Vietnamese. The perfect candidate to get bribes out of. From what I can tell simply being Asian is not enough. The first trip in 1999 when I was forced to offer the $5 in my passport by paranoid family members the agent smiled in way like it was uncommon for white people to do that. I just hope sometime this goes away. The were cracking down on this sort of thing a few years ago. I remember they were trying to show the whole world how they were cleaning up their act so the government rounded up 100 govt employees who had been collecting bribes and sentenced them to death. I guess it is not uncommon for Vietnamese officials accepting bribes to be sentenced to death.