Perhaps you should try some spelling variations:
"motor neuronse disease" » "motor neurons disease", "motor neutronse disease", "motor neuronsse disease", "motor neurose disease"
"motor neuron disease" » "motor neutron disease", "motor neurons disease", "motor neuro disease"
"motor neuronal disease" » "motor neutronal disease", "motor neuronsal disease", "motor neuroal disease", "motor neural 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 neuronse disease") or ("motor neuron disease"))) or ("motor neuronal disease"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("motor neuronse disease") OR ("motor neuron disease"))) OR ("motor neuronal disease"))*.
• Removing quotes may allow a broader search: (((( motor neuronse disease ) or ( motor neuron disease ))) or ( motor neuronal disease ))*.