Perhaps you should try some spelling variations:
"_ estimation algorithms" » "_ optimization algorithms", "_ optimisation algorithm", "_ approximation algorithms"
"_ optimized algorithm" » "_ optimized algorithms", "_ optimizer algorithms"
"robust estimation algorithm" » "robust optimization algorithm", "pose estimation algorithm", "risk estimation algorithm"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"_ estimation algorithms\") OR (\"_ optimized algorithm\"))) OR (\"robust estimation algorithm\"))~".
• Removing quotes may allow a broader search: (((( _ estimation algorithms ) OR ( _ optimized algorithm ))) OR ( robust estimation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (((("_ estimation algorithms") OR ("_ optimized algorithm"))) OR ("robust estimation algorithm"))*.