Perhaps you should try some spelling variations:
"motor neurone disease" » "motor neurons disease", "motor neuronal disease", "motor neutrone disease", "motor neuronse disease", "motor neuronale disease"
"motor neuronale disease" » "motor neuronal disease", "motor neutronale disease", "motor neuronsale disease", "motor neuronalale disease"
"motor neuron disease" » "motor neutron disease", "motor neurons disease", "motor neuronal disease"

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: (((("motor neurone disease") OR ("motor neuronale disease"))) OR ((("motor neuron disease") OR ("motor neuro 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\"))))~".
• Removing quotes may allow a broader search: (((( motor neurone disease ) OR ( motor neuronale disease ))) or ((( motor neuron disease ) or ( motor neuro disease ))))~.
• Adding a wildcard symbol may retrieve word variants: (((("motor neurone disease") OR ("motor neuronale disease"))) or ((("motor neuron disease") or ("motor neuro disease"))))*.