Perhaps you should try some spelling variations:
"parameter optimisation algorithmssssssssss" » "parameter optimization algorithmssssssssss", "parameter estimation algorithmssssssssss"
"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 algorithmssssssssss"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("parameters estimation algorithms") OR ("parameter optimisation algorithmssssssssss")).
• Removing quotes may allow a broader search: (( parameters estimation algorithms ) or ( parameter optimisation algorithmssssssssss )).
• Adding a wildcard symbol may retrieve word variants: (("parameters estimation algorithms") or ("parameter optimisation algorithmssssssssss"))*.