Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithm" » "modified multiobjective optimization algorithm"
"modified pulse estimation algorithmss" » "modified pulse estimation algorithms", "modified pulse optimization algorithms", "modified pulses estimation algorithmss", "modified pose estimation algorithmss", "modified sphere estimation algorithmss", "modified male estimation algorithmss", "modified passive estimation algorithmss"

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