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