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

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("qoe optimisation algorithm") or ((("qoe optimized algorithms") or ("_ optimized algorithms"))))~.
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• Adding a wildcard symbol may retrieve word variants: (("qoe optimisation algorithm") or ((("qoe optimized algorithms") or ("_ optimized algorithms"))))*.