Perhaps you should try some spelling variations:
"modified stochastic estimation algorithms" » "modified stochastic optimization algorithms", "modified stochastic estimation algorithm", "modified stochastic optimisation algorithm"
"modified objective optimized algorithms" » "modified objective optimized algorithm", "modified objective optimizer algorithms", "modified objective optimization algorithms", "modified objective optimal algorithms"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified stochastic estimation algorithms\") OR (\"modified objective optimized algorithms\"))~".
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