Perhaps you should try some spelling variations:
"qoe optimization algorithms" » "qoe optimisation algorithm", "qoe estimation algorithm", "qoe optimized algorithms", "game optimization algorithms", "_ optimization algorithms", "stage optimization algorithms"
"qoe estimation algorithms" » "qoe estimation algorithm", "qoe optimisation algorithm", "qoe approximation algorithms", "pose estimation algorithms", "_ estimation algorithms", "cover estimations algorithms"
"_ optimize algorithms" » "_ optimized algorithms", "_ optimizer algorithms", "_ optimized algorithm", "_ optimise algorithms"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("qoe optimization algorithms") OR ("qoe estimation algorithms"))) or ("_ optimize algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("qoe optimization algorithms") OR ("qoe estimation algorithms"))) OR ("_ optimize algorithms")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"qoe optimization algorithms\") OR (\"qoe estimation algorithms\"))) or (\"_ optimize algorithms\"))".
• Removing quotes may allow a broader search: (((( qoe optimization algorithms ) OR ( qoe estimation algorithms ))) or ( _ optimize algorithms )).
• Adding a wildcard symbol may retrieve word variants: (((("qoe optimization algorithms") OR ("qoe estimation algorithms"))) or ("_ optimize algorithms"))*.