Perhaps you should try some spelling variations:
"communicate diseases" » "communicable diseases", "complicated diseases", "communicate disabled"
"communicated disease" » "communicable diseases", "complicated diseases", "communicate state"
"communicable disease" » "communicable diseases"

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