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

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