Perhaps you should try some spelling variations:
"communicated diseases" » "communicable diseases", "complicated diseases", "communicate disabled", "communicable diseasess", "complicated diseasess", "communicate states"
"communicable disease" » "communicable diseases"
"communicated disease" » "communicable diseases", "complicated diseases", "communicate 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: (("communicable disease") OR ((("communicated diseases") OR ((("communicated disease") OR ("complicated cases")))))).
• Removing quotes may allow a broader search: (( communicable disease ) or ((( communicated diseases ) or ((( communicated disease ) or ( complicated cases )))))).
• Adding a wildcard symbol may retrieve word variants: (("communicable disease") or ((("communicated diseases") or ((("communicated disease") or ("complicated cases"))))))*.