Perhaps you should try some spelling variations:
optimization algorithms » estimation algorithm, optimized algorithms, optimizer algorithms
optimisation algorithm » estimation algorithm
estimation algorithms » estimation algorithm, approximation algorithms
some optimization » game optimization, qoe 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: (( some optimization algorithms ) OR ( _ ((optimisation algorithm) OR (estimation algorithms)) ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( some optimization algorithms ) or ( _ ((optimisation algorithm) OR (estimation algorithms)) ))~".
• Adding a wildcard symbol may retrieve word variants: (( some optimization algorithms ) or ( _ ((optimisation algorithm) OR (estimation algorithms)) ))*.