She completed a bachelor's degree in 1951 in Hanoi, studying English and French, and then traveled to Paris for a second baccalaureate in mathematics.[2] She stayed in France to study for an agrégation at the University of Toulouse, which she completed in 1959, before returning to Vietnam to become a mathematics teacher at the Hanoi National University of Education.[2] Hoàng became the first female mathematician in Vietnam[3] and at that time was one of a very small number of mathematicians there with a foreign education.[4]