Perhaps you should try some spelling variations:
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"nato science stories 2:, physics" » "nato science studies 2:, physics", "nato science series 2:, physics", "nato science theories 2:, physics", "radio science stories 2:, physics", "national science stories 2:, physics", "nato science stories a:, physics", "nato science stories c:, physics"
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Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nato science stories b:, physics") OR ("nato science stories 2:, physics"))) OR ("nato science stories _:, physics")).
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• Removing quotes may allow a broader search: (((( nato science stories b:, physics ) OR ( nato science stories 2:, physics ))) or ( nato science stories _:, physics )).
• Adding a wildcard symbol may retrieve word variants: (((("nato science stories b:, physics") OR ("nato science stories 2:, physics"))) or ("nato science stories _:, physics"))*.