You can't judge a book by its cover
ɗy2ŋ tʃoŋ ma6t̪ maː2 baɜt̪ hi2ɲ zɔŋ
In Vietnamese Đừng trông mặt mà bắt hình dong
This proverb is used in Vietnamese culture to advise against judging based on appearances.
Example
"Đừng trông mặt mà bắt hình dong, anh ta có thể rất tốt bụng."
