Perhaps you should try some spelling variations:
"lung / diseases, instructive" » "lung / diseases, constructive", "lung / diseases, instruction", "lung / diseases, destructive"
"lungs / disease, instructive" » "lungs / disease, constructive", "lungs / disease, instruction", "lungs / disease, destructive"

Try widening your search to All Fields.

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: (("lung / diseases, instructive") OR ("lungs / disease, instructive")).
• Removing quotes may allow a broader search: (( lung / diseases, instructive ) or ( lungs / disease, instructive )).
• Adding a wildcard symbol may retrieve word variants: (("lung / diseases, instructive") or ("lungs / disease, instructive"))*.