Perhaps you should try some spelling variations:
"nato science stories b:, physics" » "nato science studies b:, physics", "nato science series b:, physics", "nato science theories b:, physics", "national science stories b:, physics", "nato science stories 2:, physics", "nato science stories c:, physics", "nato science stories 6:, physics"
"nato science stories a:, physics" » "nato science studies a:, physics", "nato science series a:, physics", "nato science theories a:, physics", "national science stories a:, physics"
"radio science stories a:, physics" » "radio science studies a:, physics", "radio science series a:, physics", "radio science theories a:, physics"
"nato science stories _:, physics" » "nato science studies _:, physics", "nato science series _:, physics", "nato science theories _:, physics", "national science stories _:, physics"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nato science stories b:, physics") OR ((("nato science stories a:, physics") OR ("radio science stories a:, physics"))))) OR ("nato science stories _:, physics")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"nato science stories b:, physics\") or (((\"nato science stories a:, physics\") OR (\"radio science stories a:, physics\"))))) or (\"nato science stories _:, physics\"))".
• Removing quotes may allow a broader search: (((( nato science stories b:, physics ) or ((( nato science stories a:, physics ) OR ( radio science stories a:, physics ))))) or ( nato science stories _:, physics )).
• Adding a wildcard symbol may retrieve word variants: (((("nato science stories b:, physics") or ((("nato science stories a:, physics") OR ("radio science stories a:, physics"))))) or ("nato science stories _:, physics"))*.