The Vietnamese word "cười tình" is a verb that means "to smile amorously" or "to smile in a loving or flirtatious way." It is often used to describe a smile that expresses affection or romantic interest towards someone.
In Vietnamese culture, a "cười tình" can often be a subtle way to express interest or affection, especially in social or romantic settings. It’s important to read the context and body language to understand the full meaning behind the smile.