Khanh was born in 1956. Khanh's father is Toàn and her mother was Viêm Nguyễn. Her paternal grandparents were Thu and Tiệp Trịnh. She has two brothers and four sisters, named Thái, Thắng, Ninh, Bình, Thọ and Hòa. She is the third youngest of the seven children.