Perhaps you should try some spelling variations:
optimisation algorithms » optimization algorithms, estimation algorithms, estimation algorithm
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
risk optimisation » _ optimisation, risk estimation
game optimisation » game optimization, stage optimization, _ optimisation

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 ( game optimisation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (( risk optimisation algorithm ) or ( game optimisation algorithms ))*.