Vietnam is a country of natural beauty and has an excellent mix of the Chinese and French colonial cultures. It's a friendly and safe place to visit, but you have to abide by the country's etiquette, manners, culture and customs. You should keep in mind a list of Dos and Don't in Vietnam to ensure a smooth and trouble-free journey.
Do:
•Dress conservatively wherever possible.
•Use both hands to pass things.But do not pass anything over someone's head.
•Take your shoes off at the entrance if you're invited to a Vietnamese's home.
•Ask for permission when taking a photograph of someone.
•Store your cash, credit cards, airline tickets and other valuable things in a safe place.
•Try to learn a couple of basic Vietnamese phrases.