Perhaps you should try some spelling variations:
"communicated diseases" » "communicable disease", "communicate disabled", "communicate discover", "communicable diseases", "communicate states", "communicated visions"
"complicated diseases" » "complicated cases", "complex diseases", "mediated diseases"
"communicated disease" » "communicable disease", "communicate state", "communicated vision"

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