Perhaps you should try some spelling variations:
"neural model artificial neural network" » "neural femoral artificial neural network", "neural real artificial neural network", "neuron model artificial neural network", "nerf model artificial neural network"
"normal model artificial neural networks" » "normal femoral artificial neural networks", "normal real artificial neural networks", "novel model artificial neural networks"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("neural model artificial neural network") or ("normal model artificial neural networks"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("neural model artificial neural network") OR ("normal model artificial neural networks")).
• Removing quotes may allow a broader search: (( neural model artificial neural network ) or ( normal model artificial neural networks )).
• Adding a wildcard symbol may retrieve word variants: (("neural model artificial neural network") or ("normal model artificial neural networks"))*.