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

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

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