Perhaps you should try some spelling variations:
"lungs / diseases, instructive" » "lungs / disease, instructive", "lungs / diseases, destructive", "lungs / diseases, instructions"
"lung / diseases, instructive" » "lung / disease, instructive", "lung / diseases, destructive", "lung / diseases, instructions"
"lungs / diseases, constructive" » "lungs / disease, constructive", "lungs / diseases, construction", "lungs / diseases, constructing", "lungs / diseases, constructions"
"lungs / 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 ("lung / diseases, instructive"))) OR ("lungs / diseases, constructive"))) OR ("lungs / diseases, instruction")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"lungs / diseases, instructive\") OR (\"lung / diseases, instructive\"))) or (\"lungs / diseases, constructive\"))) or (\"lungs / diseases, instruction\"))".
• Removing quotes may allow a broader search: (((((( lungs / diseases, instructive ) OR ( lung / diseases, instructive ))) or ( lungs / diseases, constructive ))) or ( lungs / diseases, instruction )).
• Adding a wildcard symbol may retrieve word variants: (((((("lungs / diseases, instructive") OR ("lung / diseases, instructive"))) or ("lungs / diseases, constructive"))) or ("lungs / diseases, instruction"))*.