Perhaps you should try some spelling variations:
"modified adam estimation algorithmssssss" » "modified adam estimation algorithms", "modified df estimation algorithmssssss", "modified near estimation algorithmssssss"
"modified multiobjective estimation algorithm" » "modified multiobjective optimization algorithm"

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