Perhaps you should try some spelling variations:
communicated disease » communicable disease, communicable diseases, communicate state
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 disease ) OR ((( complicated diseases ) OR ( mediated diseases )))).
• Adding a wildcard symbol may retrieve word variants: (( communicated disease ) or ((( complicated diseases ) or ( mediated diseases ))))*.