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

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