Hard to understand, nearly unitelligible, hardly intelligbleNói nhỏ quá khó ngheHe speaks too softy so he is hard to understandUnpalatable, unacceptableNhững lý lẽ của hắn khó nghe lắmHis arguments are quite unacceptablenói nghe khó: burrnghe khó chịu: hard to the earnói nhỏ quá khó nghe: He speaks too softy so he is hard to understand