She had starred in many movies, some of which were co-produced with companies from the United States, the Philippines, Thailand, Hong Kong, Taiwan, and Japan.

Afterward, she moved to Saigon to live with her sister and went to Huỳnh Thị Ngà Middle School until the 9th grade.

At the age of 16, she entered a casting from Mỹ Vân Picture, competing against 2,000 contestants, and won the first and only prize, an acting training offer in Hong Kong.

Hằng's first film role was Tam Nuong in The Beauty of Binh Duong,[5] directed by Năm Châu in 1958.

The company's first project was Chiều kỷ niệm (Afternoon of Memories), directed by Lê Mộng Hoàng and featuring Năm Châu, Kim Cúc, Phùng Há, Thanh Tú, Huy Cường, Việt Hùng, Ngọc Nuôi and other professional actors.