Perhaps you should try some spelling variations:
"robust estimation algorithmssssss" » "robust estimation algorithm", "robust estimation algorithmsssss", "robust optimization algorithmssssss", "robust optimisation algorithmsssss", "pose estimation algorithmssssss", "risk estimation algorithmssssss"
"parameters estimation algorithms" » "parameter estimation algorithms", "parameter estimates algorithms", "parameter optimization algorithms", "parameters estimation algorithm", "parameters optimization algorithms", "parameters optimisation algorithm"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"robust estimation algorithmssssss\") OR (\"parameters estimation algorithms\"))".
• Removing quotes may allow a broader search: (( robust estimation algorithmssssss ) OR ( parameters estimation algorithms )).
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