Ăn chẳng nên đọi, nói chẳng nên lời.

Eating yet no bowls, speaking yet no words.

The meaning is criticizing someone as clumsy, stupid, uncultured or uncivilized, incompetent, and not amounting to anything. This is similar to “Thick as a brick,” “Bird brain,” and “Dumb as a rock.”

Ách giữa đàng đem quàng vào cổ.

Putting on one’s neck a yoke from the middle of the road.

The meaning is criticizing someone for inviting trouble or taking on difficulties. This is similar to “Do not borrow trouble,” “Putting one’s neck on the line,” and “Sticking your neck out.”