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

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 optimizer algorithms") OR ("_ optimized algorithms"))) OR ("cover estimation algorithm"))~.
• Removing quotes may allow a broader search: (((( qoe optimizer algorithms ) or ( _ optimized algorithms ))) or ( cover estimation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (((("qoe optimizer algorithms") or ("_ optimized algorithms"))) or ("cover estimation algorithm"))*.