Background
Trong was born in Kim Lâm, Thanh Oai, Hanoi French Indochina, ordained a priest on April 1, 1948, appointed auxiliary bishop of archdiocese of Hanoi, along with Titular bishop of Igilgili (Titular Episcopal See of Igilgili, Algeria), on March 23, 1994 and consecrated bishop on August 15, 1994.