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

Try widening your search to All Fields.

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 ("_ optimized algorithms"))) or ("_ estimation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("qoe optimization algorithms") OR ("_ optimized algorithms"))) OR ("_ estimation algorithms")).
• Removing quotes may allow a broader search: (((( qoe optimization algorithms ) or ( _ optimized algorithms ))) or ( _ estimation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (((("qoe optimization algorithms") or ("_ optimized algorithms"))) or ("_ estimation algorithms"))*.