Perhaps you should try some spelling variations:
"modified multiobjective optimizer algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective optimized algorithms", "modified multiobjective optimized algorithm"
"modified parameter optimizer algorithmsss" » "modified parameter optimized algorithms", "modified parameter optimized algorithm", "modified parameter optimized algorithmsss", "modified parameter optimized algorithmss", "modified parameter optimization algorithmsss"

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