Perhaps you should try some spelling variations:
routledge telecommunication » mobile telecommunication
"Routledge telecommunication sector." » "Routledge telecommunications sector.", "Routledge telecommunications network.", "Routledge telecommunications reform."
"routledge communication series." » "routledge communication services.", "routledge communication systems.", "routledge communication skills."

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("routledge communication series.") OR ("Routledge telecommunication sector."))~.
• Removing quotes may allow a broader search: (( routledge communication series. ) or ( Routledge telecommunication sector. ))~.
• Adding a wildcard symbol may retrieve word variants: (("routledge communication series.") or ("Routledge telecommunication sector."))*.