Perhaps you should try some spelling variations:
"qoe estimation algorithms" » "qoe estimation algorithm", "qoe optimization algorithms", "qoe optimisation algorithm", "pose estimation algorithms", "_ estimation algorithms", "cover estimations algorithms"
"qoe optimizer algorithms" » "qoe optimized algorithm", "qoe optimization algorithms"
"_ optimized algorithms" » "_ optimized algorithm", "_ optimization 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 ((("qoe optimizer algorithms") OR ("_ optimized algorithms"))))~.
• Removing quotes may allow a broader search: (( qoe estimation algorithms ) or ((( qoe optimizer algorithms ) or ( _ optimized algorithms ))))~.
• Adding a wildcard symbol may retrieve word variants: (("qoe estimation algorithms") or ((("qoe optimizer algorithms") or ("_ optimized algorithms"))))*.