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

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: (("normal model artificial neural network") OR ("normal can artificial neural network"))~.
• Removing quotes may allow a broader search: (( normal model artificial neural network ) or ( normal can artificial neural network ))~.
• Adding a wildcard symbol may retrieve word variants: (("normal model artificial neural network") or ("normal can artificial neural network"))*.