The Vietnamese word "nhét" means to stuff or cram something into a space. It's often used when you are trying to fit something into a container or a limited area, and it implies that you are pushing something in tightly or forcefully.
Nhét áo quần vào bị - "to stuff clothing into a bag."
No quá không nhét được nữa - "to be unable to stuff because one is too full with food."
Hết chỗ rồi đừng nhét thêm hành khách nữa - "It is full up, don't pack in any more passengers."
Nhét bức thư vào túi - "to slip a letter into one's pocket."