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

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