Perhaps you should try some spelling variations:
"communicated diseases" » "communicated disease", "communicable diseases", "communicable disease"
"complicated diseases" » "complicated cases", "complex diseases", "complicated case"
"communicate state" » "communicate strategy", "communicating state", "communication state"
"mediated diseases" » "related diseases", "medical diseases", "related 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: (((("communicated diseases") OR ("communicate state"))) OR ((("complicated diseases") OR ("mediated diseases")))).
• Removing quotes may allow a broader search: (((( communicated diseases ) or ( communicate state ))) or ((( complicated diseases ) or ( mediated diseases )))).
• Adding a wildcard symbol may retrieve word variants: (((("communicated diseases") or ("communicate state"))) or ((("complicated diseases") or ("mediated diseases"))))*.