Perhaps you should try some spelling variations:
today communications » optical communications, _ communications
aided communication » risk communication, mobile communication
radar communication » railway communication, risk communication, grid 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-aided communication ) or ( fiber-((((oral communication) or (radar communication))) or (today communications)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( fiber-aided communication ) OR ( fiber-((((oral communication) OR (radar communication))) OR (today communications)) )).
• Adding a wildcard symbol may retrieve word variants: (( fiber-aided communication ) or ( fiber-((((oral communication) or (radar communication))) or (today communications)) ))*.