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

Try widening your search to All Fields.

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