Most of the tour will travel to Cambodia. Laos and Thailand at the same time, so if there are factors that make a market in any member country of tourism decline, it will affect the number of tourists who come to Viet Nam.
Most will travel to Cambodia, Laos and Thailand together, so if there are factors that make a country's tourism market fell. It will affect the number of visitors to Vietnam as well.
Most travel Cambodia, Laos and Thailand. Simultaneously, so if a factor that makes the tourism market one country decreases. It will affect the number of tourists to Vietnam as well.