Perhaps you should try some spelling variations:
"parameters estimation algorithmssssssssss" » "parameter estimates algorithmssssssssss", "parameter optimization algorithmssssssssss", "parameters estimation algorithmsssssssss", "parameters optimization algorithmssssssssss", "parameters optimisation algorithmsssssssss"
"parameter estimation algorithms" » "parameter estimation algorithm", "parameter optimization algorithms", "parameter optimisation algorithm", "parameter estimates algorithms"

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 algorithmssssssssss") OR ("parameter estimation algorithms"))~.
• Removing quotes may allow a broader search: (( parameters estimation algorithmssssssssss ) or ( parameter estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("parameters estimation algorithmssssssssss") or ("parameter estimation algorithms"))*.