Perhaps you should try some spelling variations:
"modified notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one approximation algorithms"
"code learning evolution algorithm" » "code learning solution algorithm", "code learning evolutionary algorithm", "code learning convolution algorithms", "code learning convolution algorithm", "code learning emotion algorithm", "how learning evolution algorithm"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified notion approximation algorithms") or ("code learning evolution algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified notion approximation algorithms") OR ("code learning evolution algorithm")).
• Removing quotes may allow a broader search: (( modified notion approximation algorithms ) or ( code learning evolution algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified notion approximation algorithms") or ("code learning evolution algorithm"))*.