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 make optimized algorithms" » "modified make optimized algorithm", "modified make optimizer algorithms", "modified make optimization algorithms", "modified male optimized algorithms"

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