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

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

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