Perhaps you should try some spelling variations:
"mathematical models of cognitive wirelesses and neural networks" » "mathematical models of cognitive diseases and neural networks", "mathematical models of cognitive losses and neural networks"
"mathematical models of cognitive processes and neural networks" » "mathematical models of cognitive process and neural networks"

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: (("mathematical models of cognitive processes and neural networks") OR ((("mathematical models of cognitive wirelesses and neural networks") OR ("mathematical models of cognitive wireless and neural networks")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"mathematical models of cognitive processes and neural networks\") or (((\"mathematical models of cognitive wirelesses and neural networks\") OR (\"mathematical models of cognitive wireless and neural networks\"))))".
• Removing quotes may allow a broader search: (( mathematical models of cognitive processes and neural networks ) or ((( mathematical models of cognitive wirelesses and neural networks ) OR ( mathematical models of cognitive wireless and neural networks )))).
• Adding a wildcard symbol may retrieve word variants: (("mathematical models of cognitive processes and neural networks") or ((("mathematical models of cognitive wirelesses and neural networks") OR ("mathematical models of cognitive wireless and neural networks"))))*.