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

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 algorithmssssssssss") or ("parameters optimization algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("attribute optimization algorithmssssssssss") OR ("parameters optimization algorithm")).
• Removing quotes may allow a broader search: (( attribute optimization algorithmssssssssss ) or ( parameters optimization algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("attribute optimization algorithmssssssssss") or ("parameters optimization algorithm"))*.