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

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 ("lungs / diseases, destructive"))) OR ("lungs / diseases, instruction")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"lungs / diseases, instructive\") OR (\"lungs / diseases, destructive\"))) or (\"lungs / diseases, instruction\"))".
• Removing quotes may allow a broader search: (((( lungs / diseases, instructive ) OR ( lungs / diseases, destructive ))) or ( lungs / diseases, instruction )).
• Adding a wildcard symbol may retrieve word variants: (((("lungs / diseases, instructive") OR ("lungs / diseases, destructive"))) or ("lungs / diseases, instruction"))*.