vấn đề rắc rối 
complicated problem, complicated issue [ vấn ] : to ask, question
[ đề ] : (1) to write; (2) to propose; (3) to lift
[ rối ] : tangled, entangled, mixed up
Most Common Compounds Set 1:
Most Common Compounds Set 2 :
vấn đề rắc rối complicated problem, complicated issue