Perhaps you should try some spelling variations:
"modified coverage approximation algorithms" » "modified average approximation algorithms"
"modified norway solution algorithms" » "modified norway solution algorithm", "modified norway evolution algorithm", "modified norway convolution algorithms", "modified orca solution algorithms", "modified nodal solution 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 norway solution algorithms\") OR (\"modified coverage approximation algorithms\"))~".
• Removing quotes may allow a broader search: (( modified norway solution algorithms ) OR ( modified coverage approximation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified norway solution algorithms") OR ("modified coverage approximation algorithms"))*.