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

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

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