/ˈdjuːti ʌv ˈlɔɪəlti/ – Phrase
Definition: Trách nhiệm trung thành.
A more thorough explanation: 1. the legal requirement that an employee act in the best interests of his employer
2. the obligation to be faithful to a person or organization, such as a company
Example: 1. Most employees owe their employers a duty of loyalty whether or not they have a formal employment contract.
2. By making negative comments to the newspaper, he breached his duty of loyalty to the company.