Perhaps you should try some spelling variations:
"parameter estimation algorithms" » "parameter estimation algorithm", "parameter optimization algorithms", "parameter optimisation algorithm", "parameter estimates algorithms"
"notion optimization algorithmsssssssssssssss" » "network optimization algorithmsssssssssssssss", "policy optimization algorithmsssssssssssssss", "allocation optimization algorithmsssssssssssssss"

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

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