Calibre Hirarchy

Hello.

Is it possible to make a book part of more than one subgroup?

In the following Series hierarchy structure

Literature
NY Times Bestsellers (June 08 2014)
Fiction

entering the following in the Series field of the metadata of a book:

Literature.NY Times Bestsellers (June 08 2014), Literature.Fiction

does not work!

Is there a way to do this?

Thank you very much for any help.