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