Perhaps you should try some spelling variations:
"qoe optimizer algorithmss" » "qoe optimizer algorithms", "qoe optimized algorithms"
"qoe optimized algorithm" » "qoe optimized algorithms", "qoe optimizer algorithms", "_ optimized algorithm"
"post estimation algorithm" » "pose estimation algorithm", "risk estimation algorithm", "pulses estimation algorithm"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("qoe optimizer algorithmss") or ("qoe optimized algorithm"))) or ("post estimation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("qoe optimizer algorithmss") OR ("qoe optimized algorithm"))) OR ("post estimation algorithm")).
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• Adding a wildcard symbol may retrieve word variants: (((("qoe optimizer algorithmss") or ("qoe optimized algorithm"))) or ("post estimation algorithm"))*.