Perhaps you should try some spelling variations:
"communicable disease" » "communicable diseases"
"communication state" » "communication style", "communicating state", "communication strategy"
"communicate state" » "communicate strategy", "communicating state", "communicate make"

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: (((("communicate state") OR ("communication state"))) OR ("communicable disease")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"communicate state\") OR (\"communication state\"))) or (\"communicable disease\"))".
• Removing quotes may allow a broader search: (((( communicate state ) OR ( communication state ))) or ( communicable disease )).
• Adding a wildcard symbol may retrieve word variants: (((("communicate state") OR ("communication state"))) or ("communicable disease"))*.