Perhaps you should try some spelling variations:
"communicating systems" » "communications systems", "communication systems", "communication system"
"communicating state" » "communicating climate", "communicating a", "communicating automata"
"communication state" » "communication style", "communication strategy", "communication savante"
"communicate state" » "communicate strategy", "communicate make", "communicate chapter"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("communicable diseases") OR ((("communicable disease") OR ((((("communicate state") OR ((("communicating state") OR ("communicating systems"))))) OR ("communication state")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"communicable diseases\") or (((\"communicable disease\") or (((((\"communicate state\") or (((\"communicating state\") OR (\"communicating systems\"))))) or (\"communication state\"))))))".
• Removing quotes may allow a broader search: (( communicable diseases ) or ((( communicable disease ) or ((((( communicate state ) or ((( communicating state ) OR ( communicating systems ))))) or ( communication state )))))).
• Adding a wildcard symbol may retrieve word variants: (("communicable diseases") or ((("communicable disease") or ((((("communicate state") or ((("communicating state") OR ("communicating systems"))))) or ("communication state"))))))*.