Perhaps you should try some spelling variations:
"modified passive optimization algorithmss" » "modified passive optimization algorithms", "modified passive optimisation algorithm", "modified passive estimation algorithms", "modified bayesian optimization algorithmss", "modified game optimization algorithmss", "modified policy optimization algorithmss", "modified adaptive optimization algorithmss"
"modified objective estimation algorithm" » "modified objective optimization algorithm", "modified objective allocation algorithm"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified objective estimation algorithm") OR ("modified passive optimization algorithmss"))~.
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