qua đường bưu điện 
through, via the mail, post [ qua ] : after, by, through, over; last (week, day, etc.); to pass by, go across, cross over
[ đường ] : (1) route, road, street, path, avenue, lane; (2) sugar
[ bưu ] : post, postal service
[ điện ] : electricity, electric; palace, temple, main government building
Most Common Compounds Set 1:
Most Common Compounds Set 2 :