/ˈvælɪd ˈriːzən/ – Phrase
Definition: lý do chính đáng.
A more thorough explanation: A valid reason refers to a legally acceptable or justifiable explanation or rationale for a particular action, decision, or behavior. It is a reason that is supported by law, logic, or evidence and is considered legitimate or reasonable in the eyes of the law.
Example: The court found that the defendant did not have a valid reason for breaching the contract.