Perhaps you should try some spelling variations:
mobile communication » aided communication
optic communication » optical communications, political communication
grid communication » aided communication, radar communication, _ communication
oral communication » today communications, radar communication, _ communication
risk communication » aided 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 (grid communication))) or (oral communication)) ) or ( fiber-((mobile communication) OR (risk communication)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( fiber-((((optic communication) OR (grid communication))) OR (oral communication)) ) OR ( fiber-((mobile communication) OR (risk communication)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( fiber-((((optic communication) or (grid communication))) or (oral communication)) ) or ( fiber-((mobile communication) OR (risk communication)) ))".
• Adding a wildcard symbol may retrieve word variants: (( fiber-((((optic communication) or (grid communication))) or (oral communication)) ) or ( fiber-((mobile communication) OR (risk communication)) ))*.