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