Perhaps you should try some spelling variations:
"modified orcadverage approximation algorithms" » "modified average approximation algorithms", "modified dorcadverage approximation algorithms", "modified orcaddverage approximation algorithms", "modified ohcadverage 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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified orcadverage approximation algorithms\") OR (\"modified orca convolution algorithms\"))~".
• Removing quotes may allow a broader search: (( modified orcadverage approximation algorithms ) OR ( modified orca convolution algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified orcadverage approximation algorithms") OR ("modified orca convolution algorithms"))*.