Perhaps you should try some spelling variations:
"modified parameter optimized algorithms" » "modified parameter optimized algorithm", "modified parameter optimizer algorithms", "modified parameter optimization algorithms"
"modified orca approximation algorithms" » "modified one approximation algorithms", "modified _ approximation algorithms", "modified time 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 approximation algorithms") OR ("modified parameter optimized algorithms"))~.
• Removing quotes may allow a broader search: (( modified orca approximation algorithms ) or ( modified parameter optimized algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified orca approximation algorithms") or ("modified parameter optimized algorithms"))*.