Perhaps you should try some spelling variations:
mobile communication » aided communication, risk communication
today communications » radar communication, aided communication, _ communications
optic communication » grid communication, political communication
oral communication » grid communication, radar communication, _ communication

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( fiber-optic communication ) or ( fiber-((((oral communication) OR (mobile communication))) or (((today communications) or (optical communications)))) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( fiber-optic communication ) OR ( fiber-((((oral communication) OR (mobile communication))) OR (((today communications) OR (optical communications)))) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( fiber-optic communication ) or ( fiber-((((oral communication) OR (mobile communication))) or (((today communications) or (optical communications)))) ))".
• Adding a wildcard symbol may retrieve word variants: (( fiber-optic communication ) or ( fiber-((((oral communication) OR (mobile communication))) or (((today communications) or (optical communications)))) ))*.