It’s been recommended by experts that the value in VND will increase if the government accepts more international trades which also include importing instead of just exporting like they’ve been doing. Also, loosening the controls and regulations of the country is another way. The Vietnamese government should encourage more interactions with the rest of the world in order to stimulate the growth of the economy.
Also, if Vietnam welcomes more foreign investors/businessmen to come into the country to open more hotels and restaurant chains, the country will likely change its currency value really fast. Moreover, Vietnam can become one of the strongest players in the global market.