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

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