Perhaps you should try some spelling variations:
optimisation algorithm » optimization algorithms, estimation algorithm
starting optimisation » staffing optimization, static optimization
estimation algorithms » estimation algorithm, optimization algorithms, approximation algorithms
write estimation » 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: (( starting optimisation algorithm ) OR ( write estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (( starting optimisation algorithm ) or ( write estimation algorithms ))*.