Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective estimation algorithm", "modified multiobjective optimisation algorithm"
"modified sphere optimization algorithmss" » "modified sphere optimization algorithms", "modified sphere optimisation algorithm", "modified sphere estimation algorithm", "modified sphere estimation algorithmss", "modified stage optimization algorithmss", "modified response optimization algorithmss"

You may be able to get more results by adjusting your search query.

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified sphere optimization algorithmss\") OR (\"modified multiobjective estimation algorithms\"))".
• Removing quotes may allow a broader search: (( modified sphere optimization algorithmss ) OR ( modified multiobjective estimation algorithms )).
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