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

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• Performing a fuzzy search may retrieve terms with similar spellings: (("modified multiobjective optimization algorithms") OR ("modified bayesian optimized algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified multiobjective optimization algorithms\") OR (\"modified bayesian optimized algorithm\"))*".
• Removing quotes may allow a broader search: (( modified multiobjective optimization algorithms ) OR ( modified bayesian optimized algorithm ))*.