Perhaps you should try some spelling variations:
"modified notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one approximation algorithms"
"core learning predation algorithm" » "core learning predators algorithm", "core learning estimation algorithm", "core learning prediction algorithm", "core learning emotion algorithm", "how learning predation algorithm"

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