đầu đàn 
biggest of a flock (herd) [ đầu ] : (1) beginning, first; (2) head, mind, pole, end, hood (of a car)
[ đàn ] : (1) musical instrument; (2) flock, herd, band, drove, group
Most Common Compounds Set 1:
Most Common Compounds Set 2 :
đầu đàn biggest of a flock (herd)