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like: vấn đề gai góc
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ENGLISH DEFINITIONS
exact:
VNEN
vấn đề gai góc
*
☊
difficult, thorny problem
*
☊
all words:
VNEN
vấn đề gai góc
*
☊
difficult, thorny problem
*
☊
ℹ
vấn đề gai góc * ☊ 
difficult, thorny problem * ☊ vấn đề gai góc * ☊ difficult, thorny problem * ☊