Factors under the Influence of the Elderly Tourists' Motive in Vietnam: Study in Hanoi 1. Introduction Currently, there are about 10.1 million of the elderly in Vietnam, making up 11% of the population, it is forecast that the density of the elderly in Vietnam will gain 18% in 2030and then 26% in 2050. In recent years, with increased living standards and improved health, human lifespan is increasingly risen, associated with the requirements of life quality increase for the elderly. Tourisn is a good measure in order to release the stress and an enjoyable and useful trip