Perhaps you should try some spelling variations:
"communicate diseases" » "communicable diseases", "communicable disease", "communicate discover"
"communicate disabled" » "communicate discover", "communicate listen", "communicate deliverables"
"communicated disease" » "communicable disease", "communicable diseases", "communicate state"
"complicated diseases" » "complicated cases", "complex diseases", "mediated diseases"
"communicate defined" » "community defined", "communication defines", "communication define"

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