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

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