Perhaps you should try some spelling variations:
"pose estimation algorithmss" » "pose estimation algorithms", "pose estimation algorithm", "pose optimization algorithms", "poses estimation algorithmss", "post estimation algorithmss", "jose estimation algorithmss"
"_ optimization algorithm" » "_ optimization algorithms", "_ optimisation algorithm", "_ estimation algorithm"
"_ optimize algorithms" » "_ optimized algorithms", "_ optimizer algorithms", "_ optimized algorithm", "_ 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 algorithmss") or ((("_ optimize algorithms") or ("_ optimization algorithm"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("pose estimation algorithmss") OR ((("_ optimize algorithms") OR ("_ optimization algorithm")))).
• Removing quotes may allow a broader search: (( pose estimation algorithmss ) or ((( _ optimize algorithms ) or ( _ optimization algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("pose estimation algorithmss") or ((("_ optimize algorithms") or ("_ optimization algorithm"))))*.