Perhaps you should try some spelling variations:
"attribute optimization algorithms" » "attribute optimisation algorithm", "attribute estimation algorithms", "attribute estimation algorithm", "attributed optimization algorithms", "attributes optimization algorithms"
"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: (("attribute optimization algorithms") or ("parameters optimization algorithmssssssss"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("attribute optimization algorithms") OR ("parameters optimization algorithmssssssss")).
• Removing quotes may allow a broader search: (( attribute optimization algorithms ) or ( parameters optimization algorithmssssssss )).
• Adding a wildcard symbol may retrieve word variants: (("attribute optimization algorithms") or ("parameters optimization algorithmssssssss"))*.