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

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