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

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("parameter estimation algorithmsssssssss") OR ("parameters estimation algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"parameter estimation algorithmsssssssss\") OR (\"parameters estimation algorithms\"))".
• Removing quotes may allow a broader search: (( parameter estimation algorithmsssssssss ) OR ( parameters estimation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("parameter estimation algorithmsssssssss") OR ("parameters estimation algorithms"))*.