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

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

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