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

Try widening your search to All Fields.

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

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