Perhaps you should try some spelling variations:
approximations algorithm » approximation algorithm, approximation algorithms
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
rough approximations » one approximation
game optimization » stage optimization, qoe optimization, market optimization

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( rough approximations algorithm ) OR ( game optimization algorithms ))~".
• Adding a wildcard symbol may retrieve word variants: (( rough approximations algorithm ) OR ( game optimization algorithms ))*.