Perhaps you should try some spelling variations:
"modified game optimisation algorithms" » "modified game optimisation algorithm", "modified game optimization algorithms", "modified game estimation algorithms", "modified stage optimization algorithms", "modified _ optimisation algorithms", "modified male optimisation algorithms", "modified adam optimisation algorithms"
"modified objective allocation algorithm" » "modified objective estimation algorithm", "modified objective evolution algorithm", "modified objective predation algorithm"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified game optimisation algorithms") OR ("modified objective allocation algorithm"))~.
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