Perhaps you should try some spelling variations:
"modified stochastic convolution algorithms" » "modified stochastic configuration algorithms", "modified stochastic evolution algorithm", "modified stochastic solution algorithm"
"modified location estimation algorithm" » "modified motion estimation algorithm", "modified carbon estimation algorithm"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified stochastic convolution algorithms") OR ("modified location estimation algorithm"))~.
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