The Vietnamese word "thoảng" can be understood as a way to describe something that is present but not very strong or intense. It often refers to a faint or subtle sensation, like a light breeze or a gentle scent that you notice briefly.
Mùi hoa thoảng thoảng: "The scent of flowers is faintly present."
Gió thoảng thoảng: "A slight breeze is blowing."
In summary, "thoảng" is a versatile word that conveys a sense of subtlety and lightness in various contexts, particularly with smells, sounds, and feelings.