如何在“grep -R”中排除与glob模式匹配的多个目录？

I have some directories with names like "mm-yyyy" (01-2014) in current directory. I want to grep the files in directories whose names have "2013". How can I exclude directories whose names don't have "2013"? I tried the following but it didn't work:I have some directories with names like "mm-yyy