Perhaps you should try some spelling variations:
"communicated diseases" » "communicated disease", "communicate discover", "communicated threats"
"communicate diseases" » "communicated disease", "communicate discover", "communicate messages"
"complicated diseases" » "complicated cases", "complex diseases", "mediated diseases"
"communicate disabled" » "communicate discover", "communicate listen", "communicated disease"

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