Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithm" » "modified multiobjective optimization algorithms", "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithm"
"modified sales solution algorithm" » "modified sales evolution algorithm", "modified sales convolution algorithms", "modified sales evolutionary algorithm", "modified male solution algorithm", "modified traces solution algorithm", "modified saline solution algorithm", "modified water solution algorithm"

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