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

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