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

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("parameters estimation algorithms") or ("parameter optimisation algorithmssssssssssss"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("parameters estimation algorithms") OR ("parameter optimisation algorithmssssssssssss")).
• Removing quotes may allow a broader search: (( parameters estimation algorithms ) or ( parameter optimisation algorithmssssssssssss )).
• Adding a wildcard symbol may retrieve word variants: (("parameters estimation algorithms") or ("parameter optimisation algorithmssssssssssss"))*.