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

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