trước kia 
before, previous, former; formerly, once, in the past | Adverbs of Time | formerly | (Google translate:) trước kia | (Google translate:) ehemals |
[ trước ] : before, in front, previously; faced with, in the face of, ahead of
[ kia ] : instead, other, that, those, yonder
Most Common Compounds Set 1:
Most Common Compounds Set 2 :