nụ cười
form one's features into a pleased, kind, or amused expression, typically with the corners of the mouth turned up and the front teeth exposed.
:
• She gave a warm smile.
Cô ấy nở một nụ cười ấm áp.
• His face broke into a broad smile.
Khuôn mặt anh ấy nở một nụ cười rộng.