Perhaps you should try some spelling variations:
complications disease » applications disease, complications case, replication disease
communicated disease » complicated diseases, communicate state, communicated vision
complicate disease » complicated diseases, compleat disease, complicated case

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