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

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("_ optimize algorithm") OR ("one optimized algorithm"))) OR ("risk estimation algorithms"))~.
• Removing quotes may allow a broader search: (((( _ optimize algorithm ) or ( one optimized algorithm ))) or ( risk estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (((("_ optimize algorithm") or ("one optimized algorithm"))) or ("risk estimation algorithms"))*.