Perhaps you should try some spelling variations:
"modified ddddddorcadd predation algorithm" » "modified ddddddorcadd predators algorithm", "modified dddddddorcadd predation algorithm", "modified ddddddorcaddd predation algorithm", "modified ddddddohcadd predation 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 ddddddorcadd predation algorithm") OR ("modified orca estimation algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified ddddddorcadd predation algorithm\") OR (\"modified orca estimation algorithm\"))".
• Removing quotes may allow a broader search: (( modified ddddddorcadd predation algorithm ) OR ( modified orca estimation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified ddddddorcadd predation algorithm") OR ("modified orca estimation algorithm"))*.