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

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("risk optimisation algorithm") OR ("_ optimisation algorithm"))) OR ("_ optimized algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"risk optimisation algorithm\") OR (\"_ optimisation algorithm\"))) or (\"_ optimized algorithm\"))~".
• Removing quotes may allow a broader search: (((( risk optimisation algorithm ) OR ( _ optimisation algorithm ))) or ( _ optimized algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (((("risk optimisation algorithm") OR ("_ optimisation algorithm"))) or ("_ optimized algorithm"))*.