Vovinam to demonstrate Vovinam publicly in Hanoi with his disciples in 1940, Nguyễn was invited to teach the art at Hanoi's Ecole Normale, and Vovinam gained in popularity. During the following years, political unrest increased throughout Vietnam; due to the system's nationalist political orientation, the art came under suppression. By 1954, Nguyễn had emigrated to South Vietnam, where he was able to continue to teach and establish Vovinam schools. After his death in 1960, Grandmaster Le Sang continued the development and international promotion of Vovinam until his own death on September 27, 2010. The first Vovinam school outside of Vietnam was
Vovinam techniques are trained, as well as forms, combat and traditional wrestling. The wide range of techniques include punching, kicking, forms, wrestling, sword, staff, axe, folding fan and others. Self-defense techniques cover defense against weaponless attacks like choking from behind and defense against attackers armed with knifes or swords. Advanced students learn to combine the techniques and defend themselves against armed opponents. Instructors teach traditional weapons like the long stick, short stick, knife, sword and sabre. The weapons thus serve as training devices for reaching optimal control of body and mind. Vovinam Việt Võ Đạo was founded as "Vovinam" by Nguyễn