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

Try widening your search to All Fields.

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