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