từ lúc trước khi 
since before [ từ ] : from, since, of; to leave; to turn down; word, expression, vocabulary; temple guard; to renounce, give up
[ lúc ] : moment, instant, time; when, at the moment that
[ trước ] : before, in front, previously; faced with, in the face of, ahead of
[ khi ] : occasion, time (when something happens), when, at the time of, if
Most Common Compounds Set 1:
Most Common Compounds Set 2 :