Perhaps you should try some spelling variations:
"sphere estimation algorithms" » "sphere estimation algorithm", "sphere optimization algorithms", "sphere optimisation algorithm", "pose estimation algorithms"
"_ optimized algorithms" » "_ optimizer algorithms", "_ optimization algorithms", "_ optimizer algorithmss"
"qoe optimized algorithm" » "qoe optimizer algorithms"

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

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