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