chẳng được bao lâu 
not very long, only for a short time [ chẳng ] : [=không] not
[ được ] : (passive marker); can, be able, okay; that, which; to have, receive, obtain; to defeat, beat
[ bao ] : (1) how much, many, so much, so many, some, any; (2) envelope, bag, pack, case, sleeve; to cover, enclose
[ lâu ] : long (of time); to take a long time
Most Common Compounds Set 1:
Most Common Compounds Set 2 :