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