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

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

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