Perhaps you should try some spelling variations:
"modified stochastic estimation algorithms" » "modified stochastic optimization algorithms", "modified stochastic optimisation algorithm", "modified stochastic approximation algorithms"
"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 stochastic estimation algorithms") OR ("modified objective estimation algorithm"))*.
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