Perhaps you should try some spelling variations:
optimisation algorithm » optimization algorithms, estimation algorithm
staffing optimisation » staffing optimization, static optimization
estimation algorithms » estimation algorithm, optimization algorithms, approximation algorithms
risk estimation » pose estimation

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