The Vietnamese word "bẻ bai" is a verb that means to find fault with something or to criticize it, often in a petty or nagging way. It can refer to the act of nitpicking or complaining about small issues rather than addressing more significant problems.
In more advanced conversations, "bẻ bai" can be used in discussions about constructive criticism versus destructive criticism. While it can sometimes be beneficial to point out flaws for improvement, "bẻ bai" usually carries a negative connotation, implying that the criticism is excessive or unwarranted.
While "bẻ bai" mainly refers to criticism, it can sometimes be used more loosely to describe any situation where someone is being overly picky or difficult.