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