Perhaps you should try some spelling variations:
"modified _ optimisation algorithmssssss" » "modified _ optimization algorithms", "modified _ optimization algorithmsssssss", "modified _ estimation algorithmssssss", "modified _ estimation algorithmsssssss"
"modified multiobjective optimisation algorithm" » "modified multiobjective optimization algorithm", "modified objective optimization algorithm", "modified multiobjective optimization algorithms", "modified multiobjective estimation algorithm", "modified multiobjective estimation algorithms"

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