Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
optimized algorithms » optimizer algorithms
optimized algorithm » optimizer algorithms
risk optimization » robust optimization, _ optimization, game optimization

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( risk optimization algorithms ) or ( same ((optimized algorithms) OR (optimized algorithm)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( risk optimization algorithms ) OR ( same ((optimized algorithms) OR (optimized algorithm)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( risk optimization algorithms ) or ( same ((optimized algorithms) OR (optimized algorithm)) ))".
• Adding a wildcard symbol may retrieve word variants: (( risk optimization algorithms ) or ( same ((optimized algorithms) OR (optimized algorithm)) ))*.