Perhaps you should try some spelling variations:
"modified orca evaluation algorithm" » "modified orca evolution algorithm", "modified orca estimation algorithm", "modified orca solution algorithm", "modified urban evaluation algorithm", "modified large evaluation algorithm"
"modified notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one 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: (("modified orca evaluation algorithm") OR ("modified notion approximation algorithms"))~.
• Removing quotes may allow a broader search: (( modified orca evaluation algorithm ) or ( modified notion approximation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified orca evaluation algorithm") or ("modified notion approximation algorithms"))*.