Perhaps you should try some spelling variations:
"routledge telecommunications networks." » "routledge communication networks.", "house telecommunications networks.", "mobile telecommunications networks.", "routledge communications networks.", "contents telecommunications networks.", "routledge telecommunications sector.", "routledge telecommunications reform."
"routledge telecommunication systems." » "routledge communication systems.", "mobile telecommunication systems.", "contents telecommunication systems.", "routledge telecommunication services."

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("routledge telecommunication systems.") or ("routledge telecommunications networks."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("routledge telecommunication systems.") OR ("routledge telecommunications networks.")).
• Removing quotes may allow a broader search: (( routledge telecommunication systems. ) or ( routledge telecommunications networks. )).
• Adding a wildcard symbol may retrieve word variants: (("routledge telecommunication systems.") or ("routledge telecommunications networks."))*.