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

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

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