Perhaps you should try some spelling variations:
"qoe estimation algorithms" » "qoe estimation algorithm", "qoe optimization algorithms", "qoe optimisation algorithm", "pose estimation algorithms", "_ estimation algorithms", "cover estimations algorithms"
"done optimized algorithm" » "done optimized algorithms", "done optimizer algorithms", "dong optimized algorithm", "one optimized algorithm", "don optimized algorithm"
"cost optimized algorithm" » "cost optimized algorithms", "cost optimizer algorithms", "most optimized algorithm"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("done optimized algorithm") or ("cost optimized algorithm"))) or ("qoe estimation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("done optimized algorithm") OR ("cost optimized algorithm"))) OR ("qoe estimation algorithms")).
• Removing quotes may allow a broader search: (((( done optimized algorithm ) or ( cost optimized algorithm ))) or ( qoe estimation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (((("done optimized algorithm") or ("cost optimized algorithm"))) or ("qoe estimation algorithms"))*.