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