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