Perhaps you should try some spelling variations:
"modified notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one approximation algorithms"
"modified dorca solution algorithm" » "modified dorca evolution algorithm", "modified dorca convolution algorithms", "modified dorca evolutionary algorithm", "modified orca solution algorithm", "modified norway solution algorithm", "modified drug solution algorithm"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified notion approximation algorithms") or ("modified dorca solution algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified notion approximation algorithms") OR ("modified dorca solution algorithm"))*.
• Removing quotes may allow a broader search: (( modified notion approximation algorithms ) or ( modified dorca solution algorithm ))*.