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