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