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

Try widening your search to All Fields.

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