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