Perhaps you should try some spelling variations:
"modified ddddddddorcadd estimation algorithm" » "modified dddddddddorcadd estimation algorithm", "modified ddddddddorcaddd estimation algorithm", "modified ddddddddohcadd estimation algorithm"
"modified orca estimation algorithm" » "modified dorca estimation algorithm", "modified orcad estimation algorithm", "modified ohca estimation 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 ddddddddorcadd estimation algorithm") OR ("modified orca estimation algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified ddddddddorcadd estimation algorithm\") OR (\"modified orca estimation algorithm\"))".
• Removing quotes may allow a broader search: (( modified ddddddddorcadd estimation algorithm ) OR ( modified orca estimation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified ddddddddorcadd estimation algorithm") OR ("modified orca estimation algorithm"))*.