like: efficient, effective
VNEN
công hiệu * ☊ 
efficient, effective; efficiency, effectiveness * ☊ VNEN
hữu hiệu * ☊ efficient, effective, valid * ☊ công hiệu * ☊ efficient, effective; efficiency, effectiveness * ☊ hữu hiệu * ☊ efficient, effective, valid * ☊