From 1964 to 1966, He wrote Peace Poetry together with contemporary musician Pham Duy and Zen Master Thich Nhat Hanh.
In 1966, after finishing his study in Sinology from the University of Pedagogical, he continued to join in the activities against the war.
During this period, he continued to write poetry, articles to call the youths in urban area in 1974, he attended the International Student Festival in Budapest.
In 1989, he was voted to be the General Secretary of Literature and Art Association in Hue; In 1990, he was Vice Chief Editor of Song Huong (Perfume River) Magazine.
In 2007, He presented the subject "Peace Music and Poetry Movement during the period 1964–1966 in Sounthern Vietnam" at the invitation of William Joiner Center.