Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective estimation algorithm", "modified multiobjective optimisation algorithm"
"modified df estimation algorithmssss" » "modified df estimation algorithm", "modified df estimation algorithmsss", "modified df optimization algorithmssss", "modified df optimisation algorithmsss", "modified _ estimation algorithmssss", "modified adam estimation algorithmssss", "modified bi1 estimation algorithmssss"

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 df estimation algorithmssss") OR ("modified multiobjective estimation algorithms"))~.
• Removing quotes may allow a broader search: (( modified df estimation algorithmssss ) or ( modified multiobjective estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified df estimation algorithmssss") or ("modified multiobjective estimation algorithms"))*.