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

Try widening your search to All Fields.

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