đứng ở ngưỡng cửa 
to stand at the threshold, stand on the doorstep [ đứng ] : to stand, be standing
[ ở ] : to live, be, stay, remain; in, at
[ ngưỡng ] : threshold
[ cửa ] : door, window, entrance, opening
Most Common Compounds Set 1:
Most Common Compounds Set 2 :