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

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