Perhaps you should try some spelling variations:
"_ estimation algorithms" » "_ optimization algorithms", "_ optimisation algorithm", "_ approximation algorithms"
"_ optimized algorithms" » "_ optimized algorithm", "_ optimizer algorithms", "_ optimization algorithms"
"sphere estimation algorithm" » "pose 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: "((((\"sphere estimation algorithm\") OR (\"_ estimation algorithms\"))) OR (\"_ optimized algorithms\"))~".
• Removing quotes may allow a broader search: (((( sphere estimation algorithm ) OR ( _ estimation algorithms ))) OR ( _ optimized algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (((("sphere estimation algorithm") OR ("_ estimation algorithms"))) OR ("_ optimized algorithms"))*.