Perhaps you should try some spelling variations:
"modified ddorcaddverage approximation algorithms" » "modified average approximation algorithms", "modified dddorcaddverage approximation algorithms", "modified ddorcadddverage approximation algorithms", "modified ddohcaddverage approximation algorithms"
"modified orca convolution algorithms" » "modified orca evolution algorithm", "modified orca solution algorithm", "modified dorca convolution algorithms", "modified orcad convolution algorithms", "modified ohca convolution 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 convolution algorithms") OR ("modified ddorcaddverage approximation algorithms"))~.
• Removing quotes may allow a broader search: (( modified orca convolution algorithms ) or ( modified ddorcaddverage approximation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified orca convolution algorithms") or ("modified ddorcaddverage approximation algorithms"))*.