Perhaps you should try some spelling variations:
telecommunication services » telecommunications services, communication services, telecommunication policy
mobile telecommunication » mobile communication, mobile communications, rural telecommunications
telecommunication series » telecommunications services, telecommunication service, telecommunications service

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