Perhaps you should try some spelling variations:
communicated diseases » communicable diseases, communicate disabled, communicate discover
communicated disease » communicable diseases, communicate state, communicated vision
communicable disease » communicable diseases
complicated diseases » complicated cases, complex diseases, complicated case
mediated diseases » related diseases, medical diseases, related 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: "((\"((((communicated diseases) OR (communicated disease))) OR (communicable disease))\") or (((\"complicated diseases\") or (\"mediated diseases\"))))".
• The words AND, OR and NOT may confuse the search; try adding quotes: "\"((\\"((((communicated diseases) OR (communicated disease))) or (communicable disease))\\") or (((\\"complicated diseases\\") or (\\"mediated diseases\\"))))\"".
• Removing quotes may allow a broader search: (( ((((communicated diseases) OR (communicated disease))) or (communicable disease)) ) or ((( complicated diseases ) or ( mediated diseases )))).