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