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