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

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"normal model artificial neural network\") OR (\"normal real artificial neural network\"))~".
• Removing quotes may allow a broader search: (( normal model artificial neural network ) OR ( normal real artificial neural network ))~.
• Adding a wildcard symbol may retrieve word variants: (("normal model artificial neural network") OR ("normal real artificial neural network"))*.