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