Perhaps you should try some spelling variations:
"qoe optimization algorithms" » "qoe optimisation algorithm", "qoe estimation algorithm", "qoe optimized algorithms", "game optimization algorithms", "_ optimization algorithms", "stage optimization algorithms"
"_ estimation algorithms" » "_ estimation algorithm", "_ optimisation algorithm", "_ approximation algorithms"
"_ optimized algorithm" » "_ optimized algorithms", "_ 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: (((("_ optimized algorithm") or ("qoe optimization algorithms"))) or ("_ estimation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("_ optimized algorithm") OR ("qoe optimization algorithms"))) OR ("_ estimation algorithms")).
• Removing quotes may allow a broader search: (((( _ optimized algorithm ) or ( qoe optimization algorithms ))) or ( _ estimation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (((("_ optimized algorithm") or ("qoe optimization algorithms"))) or ("_ estimation algorithms"))*.