/ˈroʊvɪŋ æmˈbæsədər/ – Phrase
Definition: đại sứ lưu động, đặc phái viên.
A more thorough explanation: A roving ambassador is a diplomatic representative who is not assigned to a specific country or region, but instead travels to various locations to conduct negotiations, gather information, and promote the interests of their home country.
Example: The government appointed a roving ambassador to represent the country in various international negotiations.