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

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