bạn đồng nghiệp 
colleague [ bạn ] : friend, associate, companion, comrade (in something)
[ đồng ] : (1) unit of currency, money; coin; (2) field; (3) same, co-, fellow; (4) copper, brass
[ nghiệp ] : trade, profession; karma
Most Common Compounds Set 1:
Most Common Compounds Set 2 :