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 neutrone disease" » "motor neutron disease", "motor neutrino disease", "motor neurons disease"
"motor neuronse disease" » "motor neurons disease", "motor neuronal disease", "motor neutronse disease", "motor neuronsse disease", "motor neuronalse 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((((("motor neurone disease") or ("motor neutrone disease"))) or ("motor neuronse disease"))) or ((("motor neuron disease") OR ("motor neuro disease"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("motor neurone disease") OR ("motor neutrone disease"))) OR ("motor neuronse 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 neutrone disease\"))) or (\"motor neuronse disease\"))) or (((\"motor neuron disease\") OR (\"motor neuro disease\"))))".
• Removing quotes may allow a broader search: (((((( motor neurone disease ) or ( motor neutrone disease ))) or ( motor neuronse disease ))) or ((( motor neuron disease ) OR ( motor neuro disease )))).
• Adding a wildcard symbol may retrieve word variants: (((((("motor neurone disease") or ("motor neutrone disease"))) or ("motor neuronse disease"))) or ((("motor neuron disease") OR ("motor neuro disease"))))*.