Perhaps you should try some spelling variations:
"complicated diseasess" » "complicated diseases", "complicate disease", "complicated cases"
"communicate diseases" » "communicable diseases", "communicable disease", "complicated diseases"
"communicated disease" » "communicable disease", "communicable diseases", "complicated diseases"

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: (((("communicate diseases") OR ("communicated disease"))) OR ("complicated diseasess")).
• Removing quotes may allow a broader search: (((( communicate diseases ) or ( communicated disease ))) or ( complicated diseasess )).
• Adding a wildcard symbol may retrieve word variants: (((("communicate diseases") or ("communicated disease"))) or ("complicated diseasess"))*.