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

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("lungs / diseases, construction") OR ("lungs / disease, instructive")).
• Removing quotes may allow a broader search: (( lungs / diseases, construction ) or ( lungs / disease, instructive )).
• Adding a wildcard symbol may retrieve word variants: (("lungs / diseases, construction") or ("lungs / disease, instructive"))*.