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

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