Thong’s parents, Sang Van Le and Tue Thi Ho, are devout Catholics who both actively participate in their parish. Thong has four siblings: two brothers and two sisters. His older brother is a Franciscan; his older sister is a Sister of the Handmaids of Jesus Christ. Thong has a Bachelor degree in Controlling Engineering from Vinh University of Technological Education in Vietnam. Most recently, Thong taught religion to the children in his parish. Thong is currently in his fourth year at St. Paul Seminary.