Regarding the martial arts in particular, Vietnam distinguish itself from the other countries of the Asian south-east, for the complexity of its techniques: because of the political events suffered in the past (more or less far), in Vietnam spread many styles of martial arts, in part in competition with the development of local schools of Vietnamese styles. The Japanese occupation during the Second world war and the presence of Korean unit with the tradition, like Judo and Tae Kwon Do, that actually are very popular, also for their admission/recognition as olympic sport.
The relationships with China, coming from long time ago, gave more profitable results regarding the cultural exchange: for historical and geographical reasons, in fact, in Vietnam are very popular the styles of Chinese origin, particularly in that cities, like Ho Chi Minh City (Saigon), in which are present a large number of Chinese immigrates One of the main migration happened from the second half of the XVII century, with the coming of the dynasty Ching (1644), of Mancese origin, and was built mostly by the supporter of the declined dynasty Ming. The last migration happened between the end of 30ies and 50ies years of the XX century, initially because of the explosion of the Sino-Japanese war (1937), than later on the dramatic events that led Mao to power (1949). The presence of Chinese masters had great influence on the evolution of autochthons styles, but on the other side, the Chinese styles in Vietnam underwent to a process of "vietnamization" that distinguish them from the original schools.
In spite of these interferences, in Vietnam are still practiced pure Vietnamese styles, like Binh Dinh, often known in the West with the generic name of Viet Vo Dao.