Perhaps you should try some spelling variations:
"attributes estimation algorithmssss" » "attributes estimation algorithm", "attribute optimization algorithmssss", "attributes estimation algorithmsss", "attributes optimization algorithmssss", "attributes optimisation algorithmsss"
"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.

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