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

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 / diseases, constructive"))*.
• Removing quotes may allow a broader search: (( lungs / diseases, instructive ) or ( lung / diseases, constructive ))*.