dùng song song cả hai 
to use both in parallel, at the same time [ dùng ] : (1) to use, resort to; (2) to eat (polite)
[ song ] : (1) but, however, still, nevertheless; (2) pair, couple; fellow (worker, classmate); (3) window, bar
[ song ] : (1) but, however, still, nevertheless; (2) pair, couple; fellow (worker, classmate); (3) window, bar
[ cả ] : (1) oldest, biggest; old; (2) both, everyone, all (of), entire, whole; (3) even, also, as well; (4) at all
[ hai ] : two; both
Most Common Compounds Set 1:
Most Common Compounds Set 2 :