Perhaps you should try some spelling variations:
"modified learning convolution algorithm" » "modified learning convolution algorithms", "modified learning evolution algorithm", "modified learning solution algorithm", "mobile learning convolution algorithm", "modified caging convolution algorithm"
"defined network approximation algorithms" » "designed network approximation algorithms"

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: "((\"defined network approximation algorithms\") OR (\"modified learning convolution algorithm\"))~".
• Removing quotes may allow a broader search: (( defined network approximation algorithms ) OR ( modified learning convolution algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("defined network approximation algorithms") OR ("modified learning convolution algorithm"))*.