Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithms" » "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithms", "modified multiobjective estimation algorithm", "modified multiobjective optimisation algorithms", "modified multiobjective estimation algorithmss"
"modified market optimization algorithm" » "modified market optimisation algorithm", "modified market estimation algorithm", "modified market estimation algorithms", "modified game optimization algorithm", "modified parameter optimization algorithm", "modified market capitalization algorithm", "modified male optimization algorithm"

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