Perhaps you should try some spelling variations:
"modified changing optimisation algorithms" » "modified changing optimization algorithms", "modified changing estimation algorithms", "modified changing estimation algorithm", "modified changing optimization algorithmss", "modified changing estimation algorithmss", "modified staffing optimization algorithms", "modified caging optimisation algorithms"
"modified objective optimisation algorithm" » "modified objective optimization algorithm", "modified multiobjective optimization algorithm", "modified objective optimization algorithms", "modified objective estimation algorithm", "modified objective estimation algorithms"

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