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

Try widening your search to All Fields.

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