拔出萝卜带出泥

bá chū luó bo dài chū níbachuluobodaichuni

1. lit. when you pull a radish out of the ground, some dirt comes up with it (idiom)
2. fig. to uncover, during the investigation of a crime, evidence of other crimes
3. to cause further problems while working on a problem

Study it in Yanamino