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

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("_ optimisation algorithm") or ("_ optimizer algorithms"))) or ("risk estimation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("_ optimisation algorithm") OR ("_ optimizer algorithms"))) OR ("risk estimation algorithms")).
• Removing quotes may allow a broader search: (((( _ optimisation algorithm ) or ( _ optimizer algorithms ))) or ( risk estimation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (((("_ optimisation algorithm") or ("_ optimizer algorithms"))) or ("risk estimation algorithms"))*.