rắc rối lúc đầu 
initial complications [ rối ] : tangled, entangled, mixed up
[ lúc ] : moment, instant, time; when, at the moment that
[ đầu ] : (1) beginning, first; (2) head, mind, pole, end, hood (of a car)
Most Common Compounds Set 1:
Most Common Compounds Set 2 :
sau những rắc rối lúc đầu after some initial complications