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

Try widening your search to All Fields.

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