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

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