/ˈdɪɡəmi/ – noun
Definition: kết hôn lần thức 2, tái hôn,
A more thorough explanation: Digamy is a legal term that refers to the act of marrying a second time while a previous marriage is still legally valid.
Example: The court found the defendant guilty of digamy, as he had entered into a second marriage while still legally married to his first spouse.