Perhaps you should try some spelling variations:
"parameters optimization algorithmssssss" » "parameters optimisation algorithm", "parameter optimization algorithmssssss", "parameter estimation algorithmssssss", "parameters optimisation algorithmsssss", "parameters estimation algorithmssssss", "parameters estimation algorithmsssss"
"attribute optimization algorithms" » "attribute optimisation algorithm", "attribute estimation algorithms", "attribute estimation algorithm", "attributed optimization algorithms", "attributes optimization algorithms"

Try widening your search to All Fields.

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