Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithm, optimized algorithms
estimation algorithms » estimation algorithm, optimisation algorithm, approximation algorithms
objective estimation » objective optimization, objective allocation
exact optimization » game optimization, stage optimization

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: (( modified objective estimation algorithms ) OR ( modified exact optimization algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (( modified objective estimation algorithms ) or ( modified exact optimization algorithms ))*.