trả lời ngay 
to answer right away [ trả ] : (1) to pay, repay, pay back; (2) to return, give back
[ lời ] : (1) spoken words, statement; (2) interest, profit
[ ngay ] : immediately, at once, right away; to be straight, righteous, honest, exact
Most Common Compounds Set 1:
Most Common Compounds Set 2 :