Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective estimation algorithm", "modified multiobjective optimisation algorithm"
"modified orca optimized algorithms" » "modified orca optimized algorithm", "modified orca optimizer algorithms", "modified orca optimization algorithms", "modified dorca optimized algorithms", "modified orcad optimized algorithms", "modified ohca optimized algorithms"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified orca optimized algorithms") OR ("modified multiobjective estimation algorithms"))~.
• Removing quotes may allow a broader search: (( modified orca optimized algorithms ) or ( modified multiobjective estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified orca optimized algorithms") or ("modified multiobjective estimation algorithms"))*.