số điện thoại miễn phí 
toll free (telephone) number [ số ] : (1) amount, number, figure, quantity, size (of clothing), digit, edition; digital; (2) gear (of a car); (3) destiny, fate, lot
[ điện ] : electricity, electric; palace, temple, main government building
[ thoại ] : words; version
[ miễn ] : (1) exempt (from taxes, e.g.); to forgive, excuse; (2) on condition, provided that; (3) reluctant
[ phí ] : to waste, squander; expenses
Most Common Compounds Set 1:
Most Common Compounds Set 2 :