Perhaps you should try some spelling variations:
optimization algorithmss » optimisation algorithm, estimation algorithms, estimation algorithm
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
optimized algorithm » optimized algorithms, optimizer algorithms
parameter » parameters

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• Performing a fuzzy search may retrieve terms with similar spellings: parameter ((optimization algorithms) or (((optimized algorithm) or (optimization algorithmss))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: parameter ((optimization algorithms) OR (((optimized algorithm) OR (optimization algorithmss)))).
• Adding a wildcard symbol may retrieve word variants: parameter ((optimization algorithms) or (((optimized algorithm) or (optimization algorithmss))))*.