Perhaps you should try some spelling variations:
"modified multiobjective optimisation algorithm" » "modified multiobjective optimization algorithm", "modified objective optimization algorithm", "modified multiobjective estimation algorithm", "modified multiobjective estimation algorithms"
"modified make optimization algorithms" » "modified make estimation algorithms", "modified make estimation algorithm", "modified make optimized algorithms", "modified market optimization algorithms", "modified game optimization algorithms", "modified stage optimization algorithms", "modified male optimization algorithms"

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