Perhaps you should try some spelling variations:
"communicate diseases" » "communicable diseases", "communicate discover", "communicate messages"
"communicate disabled" » "communicate discover", "communicate listen", "communicate defined"
"communicated disease" » "communicable diseases", "communicate state", "communicated vision"
"communicable disease" » "communicable diseases"
"complicated diseases" » "complicated cases", "complex diseases", "mediated 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 ("communicate disabled"))) OR ((((("communicated disease") OR ("communicable disease"))) OR ("complicated diseases")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"communicate diseases\") or (\"communicate disabled\"))) or (((((\"communicated disease\") OR (\"communicable disease\"))) or (\"complicated diseases\"))))".
• Removing quotes may allow a broader search: (((( communicate diseases ) or ( communicate disabled ))) or ((((( communicated disease ) OR ( communicable disease ))) or ( complicated diseases )))).
• Adding a wildcard symbol may retrieve word variants: (((("communicate diseases") or ("communicate disabled"))) or ((((("communicated disease") OR ("communicable disease"))) or ("complicated diseases"))))*.