Perhaps you should try some spelling variations:
"parameters estimation algorithmss" » "parameters estimation algorithm", "parameters optimization algorithms", "parameter estimation algorithmss", "parameter estimates algorithmss", "parameter optimization algorithmss", "parameters estimation algorithms", "parameters optimization algorithmss", "parameters optimisation algorithms"
"attributes estimation algorithms" » "attribute optimization algorithms", "attributes estimation algorithm", "attributes optimization algorithms", "attributes 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: (("parameters estimation algorithmss") OR ("attributes estimation algorithms"))~.
• Removing quotes may allow a broader search: (( parameters estimation algorithmss ) or ( attributes estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("parameters estimation algorithmss") or ("attributes estimation algorithms"))*.