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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("sphere estimation algorithm") or ((("_ estimation algorithms") or ("_ optimized algorithms"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("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"))))*.