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

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("attributes optimization algorithms") or ("parameters optimization algorithmssssssss"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("attributes optimization algorithms") OR ("parameters optimization algorithmssssssss")).
• Removing quotes may allow a broader search: (( attributes optimization algorithms ) or ( parameters optimization algorithmssssssss )).
• Adding a wildcard symbol may retrieve word variants: (("attributes optimization algorithms") or ("parameters optimization algorithmssssssss"))*.