Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithm" » "modified multiobjective optimization algorithm"
"modified response estimation algorithms" » "modified response optimization algorithms", "modified response optimisation algorithm", "modified response approximation algorithms", "modified pose estimation algorithms", "modified response association 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 response estimation algorithms") OR ("modified multiobjective estimation algorithm"))~.
• Removing quotes may allow a broader search: (( modified response estimation algorithms ) or ( modified multiobjective estimation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified response estimation algorithms") or ("modified multiobjective estimation algorithm"))*.