 From 1974 to August 1979 he was Deputy Head of the Central Youth Union and Deputy Director of the young Volunteers of the Central Union.In September 1979, he was sent to study at the Nguyễn Ái Quốc Party School and graduated with a Bachelor of Political Science in July 1981.From July 1981 to December 1987, he held the posts of Head of the Youth Volunteer Youth Union; then the head of the Central Committee of the Union; Secretary of the Central Party Committee of the Union in Ho Chi Minh City; Member of the Central Executive Committee; Secretary of the Central Committee of the Ho Chi Minh Communist Youth Union; Vice Chairman, General Secretary of Vietnam’s Youth Union.