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

Try widening your search to All Fields.

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