ăn ở mực thước 
to behave in a most exemplary way [ ăn ] : (1) to eat (away at), attack, corrode, cost; to attend, celebrate, take part in (a event where food is served); (3) to earn illegally
[ ở ] : to live, be, stay, remain; in, at
[ mực ] : cuttle-fish; ink
[ thước ] : yard, meter, yardstick, ruler
Most Common Compounds Set 1:
Most Common Compounds Set 2 :