Meetings & Greetings
It is best to call to people in a quiet voice, using their names preceded by Mr. Mrs., or Miss. Waving or beckoning with an upturned finger is considered highly impolite.
Whereas Americans often immediately introduce themselves in given situations, the ordinary people of Vietnam think this to be rather bold and like to have a mutual acquaintance make the introduction. They will rarely introduce themselves when going into a home or office until asked to do so. This may be due...
Traditionally, most Vietnamese slightly bow when they meet each other. However, most Vietnamese living in the urban areas no longer bow.
The Vietnamese love to be hospitable and will often invite you to dinner. If gifts are taken for the family, they should be items that they could not easily obtain themselves.