vang vọng 
to echo | Perception | echoen + | to echo + | Sound | B |
[ vang ] : to echo, resound, reverberate
[ vọng ] : (1) hope; (2) to echo, resound
Most Common Compounds Set 1:
Most Common Compounds Set 2 :
hồi âm (1) to reply, answer (a letter); (2) to echo