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