đột phát 
to erupt, break out, appear suddenly [ đột ] : (1) sudden, abrupt, unexpected; (2) to sew, stitch up, mend; (3) to pierce, put a hole in (metal)
[ phát ] : to distribute, send out, become; [CL for gunshots, abrupt actions]
Most Common Compounds Set 1:
Most Common Compounds Set 2 :