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

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: "((((\"_ optimized algorithm\") OR (\"_ optimized algorithms\"))) OR (\"sphere estimation algorithms\"))~".
• Removing quotes may allow a broader search: (((( _ optimized algorithm ) OR ( _ optimized algorithms ))) OR ( sphere estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (((("_ optimized algorithm") OR ("_ optimized algorithms"))) OR ("sphere estimation algorithms"))*.