The Vietnamese word "phó tiến sĩ" translates to "associate doctor" or "associate professor" in English. It is used to refer to someone who holds an advanced academic degree, typically a master's degree or a position just below a full professor in an academic setting.
While primarily used in an academic context, "phó tiến sĩ" can be used more broadly to denote someone with substantial knowledge or expertise in a particular field, though it is less common.