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