Perhaps you should try some spelling variations:
"pose estimation algorithms" » "pose estimation algorithm", "pose optimization algorithms", "pose optimisation algorithm", "poses estimation algorithms", "post estimation algorithms", "jose estimation algorithms"
"_ optimized algorithms" » "_ optimized algorithm", "_ optimizer algorithms", "_ optimization algorithms", "_ optimised algorithms"
"_ optimize algorithms" » "_ optimizer algorithms", "_ optimized algorithm", "_ optimization algorithms", "_ optimise algorithms"

Try widening your search to All Fields.

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