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

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified bayesian optimization algorithms\") OR (\"modified passive optimization algorithms\"))~".
• Removing quotes may allow a broader search: (( modified bayesian optimization algorithms ) OR ( modified passive optimization algorithms ))~.
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