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

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"_ estimation algorithms\") OR (((\"risk optimized algorithms\") OR (\"risk optimized algorithm\"))))~".
• Removing quotes may allow a broader search: (( _ estimation algorithms ) OR ((( risk optimized algorithms ) OR ( risk optimized algorithm ))))~.
• Adding a wildcard symbol may retrieve word variants: (("_ estimation algorithms") OR ((("risk optimized algorithms") OR ("risk optimized algorithm"))))*.