From 1963-65, Mạnh was the deputy chief of the Bạch Thông wood exploitation team; he later returned to his studies, learning Russian at the Hanoi Foreign Languages College (from 1965-66).
Mạnh was the deputy chief of the Bạch Thông wood exploitation team. This was from 1963-65. He later returned to his studies. He later was learning Russian at the Hanoi Foreign Languages College (from 1965-66).