Perhaps you should try some spelling variations:
"communicated diseases" » "communicate disabled", "communicate discover", "communicated threats", "communicate states", "communicated visions"
"communicate diseases" » "communicate disabled", "communicate discover", "communicate messages"
"complicated diseases" » "complicated cases", "complex diseases", "mediated diseases"
"communicated 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 ((("communicate diseases") OR ("complicated diseases"))))) OR ((("communicated diseases") OR ((("communicated disease") 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 (((\"communicated disease\") OR (\"communicable disease\"))))))".
• Removing quotes may allow a broader search: (((( communicable diseases ) or ((( communicate diseases ) or ( complicated diseases ))))) or ((( communicated diseases ) or ((( communicated disease ) OR ( communicable disease )))))).
• Adding a wildcard symbol may retrieve word variants: (((("communicable diseases") or ((("communicate diseases") or ("complicated diseases"))))) or ((("communicated diseases") or ((("communicated disease") OR ("communicable disease"))))))*.