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