Perhaps you should try some spelling variations:
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"nato ii services, series 2: applied science" » "nato ii services, series 2: applied sciences", "nato ai services, series 2: applied science", "nato ii service, series 2: applied science", "nato 4 services, series 2: applied science", "nato ii services, series 3: applied science", "nato iii services, series 2: applied science", "nato im services, series 2: applied science", "cato ii services, series 2: applied science"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("nato ii services, series e: applied science") OR ("nato ii services, series 2: applied science")).
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• Adding a wildcard symbol may retrieve word variants: (("nato ii services, series e: applied science") or ("nato ii services, series 2: applied science"))*.