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

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