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

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