Vietnamese government regulation of foreign businesses is hampering investment. New regulations of rent for foreigner's living quarters have seen rents skyrocket. As of the end of 1996, a number of businesses say they are pulling out of Vietnam. Even so, Vietnam's economy is growing rapidly. The real situation will depend on the status of individual businesses or agencies existing in Vietnam.
People send resumes to businesses, aid agencies and even to discussion groups.
International agencies in particular are flooded with requests for voluntary work. They do not have time to answer requests for information, much less to look at them. They will not normally encourage you to send resume to their offices in Vietnam and in fact some agencies apparently charge for the cost of arranging a voluntary position. You may have better luck in getting a position through international offices of businesses or agencies in your own country. It could also be a good idea to go to Vietnam first and establish yourself there.