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

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

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