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