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

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

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