Perhaps you should try some spelling variations:
"nato science overview 1.1:, physics" » "nato service overview 1.1:, physics", "nato change overview 1.1:, physics", "radio science overview 1.1:, physics", "national science overview 1.1:, physics", "nato science overview 2:, physics"
"nato science review 1.1:, physics" » "nato evidence review 1.1:, physics", "radio science review 1.1:, physics", "national science review 1.1:, physics", "nato science review 2.1:, physics", "nato science review 11:, physics", "nato science review 10:, physics"
"nato science service b:, physics" » "radio science service b:, physics", "national science service b:, physics", "nato science service bi:, physics", "nato science service bus:, physics", "nato science service big:, physics"

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 overview 1.1:, physics") OR ("nato science review 1.1:, physics"))) OR ("nato science service b:, physics")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"nato science overview 1.1:, physics\") OR (\"nato science review 1.1:, physics\"))) or (\"nato science service b:, physics\"))".
• Removing quotes may allow a broader search: (((( nato science overview 1.1:, physics ) OR ( nato science review 1.1:, physics ))) or ( nato science service b:, physics )).
• Adding a wildcard symbol may retrieve word variants: (((("nato science overview 1.1:, physics") OR ("nato science review 1.1:, physics"))) or ("nato science service b:, physics"))*.