Perhaps you should try some spelling variations:
communicated disease » communicable disease, complicated diseases, communicate state
mediated diseases » related diseases, related disease
medical diseases » tropical diseases
communicable » communicate

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 ( ((mediated diseases) OR (medical diseases)) ))) OR ( communicated disease )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( communicable diseases ) or ( ((mediated diseases) OR (medical diseases)) ))) or ( communicated disease ))".
• Adding a wildcard symbol may retrieve word variants: (((( communicable diseases ) or ( ((mediated diseases) OR (medical diseases)) ))) or ( communicated disease ))*.