Perhaps you should try some spelling variations:
"motor neurone disease" » "motor neuronal disease", "motor neutrone disease", "motor neuronale disease"
"motor neuronale disease" » "motor neuronal disease", "motor neutronale disease", "motor neuronalale disease"
"motor neuron disease" » "motor neutron disease", "motor neuronal disease"
"motor neurons disease" » "motor neutrons disease", "motor neuronals 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 neuronale disease"))) or ((("motor neuron disease") or ("motor neuro disease"))))) or ("motor neurons disease"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("motor neurone disease") OR ("motor neuronale disease"))) OR ((("motor neuron disease") OR ("motor neuro disease"))))) OR ("motor neurons disease")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"motor neurone disease\") OR (\"motor neuronale disease\"))) or (((\"motor neuron disease\") or (\"motor neuro disease\"))))) or (\"motor neurons disease\"))".
• Removing quotes may allow a broader search: (((((( motor neurone disease ) OR ( motor neuronale disease ))) or ((( motor neuron disease ) or ( motor neuro disease ))))) or ( motor neurons disease )).
• Adding a wildcard symbol may retrieve word variants: (((((("motor neurone disease") OR ("motor neuronale disease"))) or ((("motor neuron disease") or ("motor neuro disease"))))) or ("motor neurons disease"))*.