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

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