Perhaps you should try some spelling variations:
"stochastic optimization algorithmssssssss" » "stochastic optimization algorithms", "stochastic optimization algorithmsssssssss", "stochastic optimisation algorithmssssssss", "stochastic estimation algorithmssssssss"
"parameters optimization algorithm" » "parameter optimization algorithm", "parameter estimation algorithm", "parameters optimization algorithms", "parameters optimisation algorithm", "parameters estimation algorithm"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("stochastic optimization algorithmssssssss") or ("parameters optimization algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("stochastic optimization algorithmssssssss") OR ("parameters optimization algorithm")).
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