Perhaps you should try some spelling variations:
"motor neurone disease" » "motor neuronal disease", "motor neutrone disease", "motor neuroe disease", "motor neuronale disease"
"motor neutrons disease" » "motor neutron disease", "motor neutrinos disease", "motor neutrino disease"
"motor neurons disease" » "motor neuronal disease", "motor neutrons disease", "motor neuros disease", "motor neuronals disease"
"motor neuron disease" » "motor neutron disease", "motor neuro disease", "motor neuronal disease"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("motor neurone disease") or ((("motor neutrons disease") OR ("motor neurons disease"))))) or ("motor neuron disease"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("motor neurone disease") OR ((("motor neutrons disease") OR ("motor neurons disease"))))) OR ("motor neuron disease")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"motor neurone disease\") or (((\"motor neutrons disease\") OR (\"motor neurons disease\"))))) or (\"motor neuron disease\"))".
• Removing quotes may allow a broader search: (((( motor neurone disease ) or ((( motor neutrons disease ) OR ( motor neurons disease ))))) or ( motor neuron disease )).
• Adding a wildcard symbol may retrieve word variants: (((("motor neurone disease") or ((("motor neutrons disease") OR ("motor neurons disease"))))) or ("motor neuron disease"))*.