like: sóng siêu âm
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BEGINNER LEVEL
exact:
VNEN 
sóng siêu âm * ☊ 
ultrasound wave * ☊
[ sóng ] : wave, radio wave
[ siêu ] : very large, super-, giant; to transcend
[ âm ] : (1) sound; (2) lunar; (3) Yin, female, negative, minus; (4) reading (of a Chinese character)
[ sóng ] : wave