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

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 algorithmssssss") OR ("parameters estimation algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"attribute optimization algorithmssssss\") OR (\"parameters estimation algorithms\"))".
• Removing quotes may allow a broader search: (( attribute optimization algorithmssssss ) OR ( parameters estimation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("attribute optimization algorithmssssss") OR ("parameters estimation algorithms"))*.