like: căn số bậc hai
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exact:
VNEN 
căn số bậc hai * ☊ 
square root * ☊
[ căn ] : (1) apartment, flat; (2) [CL for houses, apartments, rooms]; (3) cause, origin, root
[ số ] : (1) amount, number, figure, quantity, size (of clothing), digit, edition; digital; (2) gear (of a car); (3) destiny, fate, lot
[ bậc ] : (1) step, rung, rank, level, grade, degree; (2) [CL for famous, great people, heroes]
[ hai ] : two; both
[ số ] : number