Perhaps you should try some spelling variations:
"communicate diseases" » "communicable diseases", "communicable disease", "communicate disabled"
"communicated disease" » "communicable disease", "communicable diseases", "communicated vision"
"complicated diseases" » "complicated cases", "complex diseases", "mediated diseases"
"communicate state" » "communicate strategy", "communicating state", "communication state"

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