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

Try widening your search to All Fields.

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