hồi xưa 
old times, of old, the old days [ hồi ] : Islam, Islamic
[ hồi ] : time (when something happened), when
[ xưa ] : ancient, old
Most Common Compounds Set 1:
Most Common Compounds Set 2 :
hồi xưa tới giờ from the past until now, (has one) ever (done sth) như hồi xưa like before, as long ago