Originally Posted by Duy Dung

Alrite, you can go and ask a kid that " smoking is good or not " and then, find the answer for yourself . I think, ur old enough to get the answer for your "Vậy đợi lúc nào hút thuốc lá mới có lợi cho sức khỏe đây?" without the kid's help , yeh ? I kinda love ur sentence, but you probably didnt have enough time to think twice abt what u gonna say or I can say that you have no ability to acquire knowledge and to use it in concrete situations buddy.