like: unknown
Intermediate Level Advanced Level
Composite Words Listening Comprehension Oxford Topics Duolingo Topics 315 Activities
BEGINNER LEVEL
exact:
VNEN 
không xác định * ☊ 
unknown * ☊
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VSLW 45 hàng không rõ nguồn gốc xuất xứ ☊ (S) goods of unknown origin [ Topic Reading ]
VSLW 67 hàng trôi nổi ☊ (S) goods with unknown origin [ Advanced Reading ]