In 1980, after his son passed away of an illness, he began with « Human comedy ». The drawings, watercolors, paintings, engravings, lithographs, collages and sculpture were created. All these were performed from dreams, memories and images inspired by nature and landscape of Vietnam. And from the experience of his life is the source of inspiration for tragedies and comedies in his « Human comedy » in which have condensed the life and cheat stories that he has experienced.