Perhaps you should try some spelling variations:
"mobile telecommunications providers." » "mobile telecommunications provider.", "mobile telecommunications services.", "mobile telecommunications projects.", "mobile telecommunication providers.", "mobile communications providers.", "house telecommunications providers."
"rural telecommunications service." » "rural telecommunications services.", "rural telecommunication services.", "rural telecommunications provider.", "_ telecommunications service."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("mobile telecommunications providers.") or ("rural telecommunications service."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("mobile telecommunications providers.") OR ("rural telecommunications service."))*.
• Removing quotes may allow a broader search: (( mobile telecommunications providers. ) or ( rural telecommunications service. ))*.