Perhaps you should try some spelling variations:
"communication strategy" » "communication strategies", "communication studies"
"communicated disease" » "communicable disease", "complicated diseases", "communicated vision"
"communicate strategy" » "communicative strategy", "community strategy", "communications strategy"
"communicate state" » "communicating state", "communication 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: (("communicable diseases") OR ((("communicated disease") OR ((((("communicate state") OR ("communicate strategy"))) OR ("communication strategy")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"communicable diseases\") or (((\"communicated disease\") or (((((\"communicate state\") OR (\"communicate strategy\"))) or (\"communication strategy\"))))))".
• Removing quotes may allow a broader search: (( communicable diseases ) or ((( communicated disease ) or ((((( communicate state ) OR ( communicate strategy ))) or ( communication strategy )))))).
• Adding a wildcard symbol may retrieve word variants: (("communicable diseases") or ((("communicated disease") or ((((("communicate state") OR ("communicate strategy"))) or ("communication strategy"))))))*.