Perhaps you should try some spelling variations:
telecommunication services » telecommunications services, communication services, telecommunication policy
telecommunication systems » communication systems, telecommunications markets, telecommunications reforms
mobile telecommunication » mobile communication, mobile communications, rural telecommunications

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: (( mobile telecommunication services. ) OR ( routledge telecommunication systems. ))~.
• Adding a wildcard symbol may retrieve word variants: (( mobile telecommunication services. ) or ( routledge telecommunication systems. ))*.