vocational school 是职业学校的意思，而vocational college则是职业学院的意思，区别可以从以下例子看出：

You should study in vocational College, who will issue recognized certification after you finishing study, but I not sure you will get one from vocational school. 你应该在职业学院学习，你完成学业后他们会颁发认可的证书，但我不确定你会从职业学校获得证书。