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