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like: validity, effectiveness
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ENGLISH DEFINITIONS
exact:
VNEN
hiệu lực
*
☊
validity, effectiveness
*
☊
all words:
VNEN
hiệu lực
*
☊
validity, effectiveness
*
☊
ℹ
hiệu lực * ☊ 
validity, effectiveness * ☊ hiệu lực * ☊ validity, effectiveness * ☊