Perhaps you should try some spelling variations:
"routledge telecommunication system." » "routledge communication system.", "mobile telecommunication system.", "routledge telecommunication systems.", "routledge telecommunication services.", "routledge telecommunication union."
"contents telecommunication sector." » "countries telecommunication sector.", "connect telecommunications sector.", "contents communication sector.", "contents telecommunications sector.", "contents telecommunication systems.", "contents telecommunication services."

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 system.") OR ("contents telecommunication sector."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"routledge telecommunication system.\") OR (\"contents telecommunication sector.\"))".
• Removing quotes may allow a broader search: (( routledge telecommunication system. ) OR ( contents telecommunication sector. )).
• Adding a wildcard symbol may retrieve word variants: (("routledge telecommunication system.") OR ("contents telecommunication sector."))*.