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