Hach was born to a farming family in Kampong Preah Commune, Sangkae District, Battambang Province, Cambodia.
He studied at Wat Kampong Preah Primary School and could read sastra sloek roet (សាស្ត្រាស្លឹករឹត), a kind of Khmer book made from leaves, very fluently.
[4] In 1932, he passed the entrance exam at Preah Sisovath High School in Phnom Penh.
In 1952, King Norodom Sihanouk appointed him as the secretary of Ministry of Public Works and Communication by Royal Decree 252.
On January 17, 1958, he became a member of the Khmer Writer Association, created by Rim Kin in 1954, according to Neak Nipun Khmer Magazine Year 2, Number 3, February 1996 Page 3.