Perhaps you should try some spelling variations:
"qoe optimizer algorithms" » "qoe optimized algorithm", "qoe optimization algorithms"
"qoe optimized algorithms" » "qoe optimized algorithm", "qoe optimization algorithms", "_ optimized algorithms"
"jose estimation algorithm" » "pose estimation algorithm", "risk 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: (((("qoe optimizer algorithms") OR ("qoe optimized algorithms"))) or ("jose estimation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("qoe optimizer algorithms") OR ("qoe optimized algorithms"))) OR ("jose estimation algorithm")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"qoe optimizer algorithms\") OR (\"qoe optimized algorithms\"))) or (\"jose estimation algorithm\"))".
• Removing quotes may allow a broader search: (((( qoe optimizer algorithms ) OR ( qoe optimized algorithms ))) or ( jose estimation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("qoe optimizer algorithms") OR ("qoe optimized algorithms"))) or ("jose estimation algorithm"))*.