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