Perhaps you should try some spelling variations:
"most optimized algorithms" » "most optimizer algorithms", "most optimization algorithms", "most optimizer algorithmss"
"post optimized algorithm" » "post optimizer algorithms", "cost optimized algorithm"
"qoe estimation algorithm" » "pose estimation algorithm", "_ estimation algorithm", "cover estimations algorithm"

Try widening your search to All Fields.

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