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

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