Perhaps you should try some spelling variations:
"nato science theories 10:, physics" » "nato science theory 10:, physics", "nato science three 10:, physics", "national science theories 10:, physics", "nato science theories 1:, physics", "nato science theories 3:, physics", "nato science theories 4:, physics"
"nato science theories 11:, physics" » "nato science theory 11:, physics", "nato science three 11:, physics", "national science theories 11:, physics", "nato science theories 1:, physics", "nato science theories 3:, physics", "nato science theories 4:, physics"
"nato science series 10:, physics" » "nato science services 10:, physics", "nato science stories 10:, physics", "nato sciences serious 10:, physics", "national science series 10:, physics", "nato science series 1:, physics", "nato science series 3:, physics", "nato science series 2:, physics"
"radio science series 10:, physics" » "radio science services 10:, physics", "radio science stories 10:, physics", "radio sciences serious 10:, physics", "radio science series 1:, physics", "radio science series 3:, physics", "radio science series 2:, physics"
"animal science series 10:, physics" » "animal science services 10:, physics", "animal science stories 10:, physics", "animal sciences serious 10:, physics", "animal science series 1:, physics", "animal science series 3:, physics", "animal science series 2:, 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 series 10:, physics") OR ("radio science series 10:, physics"))) OR ((("nato science theories 10:, physics") OR ("nato science theories 11:, physics"))))) OR ("animal science series 10:, physics")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"nato science series 10:, physics\") or (\"radio science series 10:, physics\"))) or (((\"nato science theories 10:, physics\") OR (\"nato science theories 11:, physics\"))))) or (\"animal science series 10:, physics\"))".
• Removing quotes may allow a broader search: (((((( nato science series 10:, physics ) or ( radio science series 10:, physics ))) or ((( nato science theories 10:, physics ) OR ( nato science theories 11:, physics ))))) or ( animal science series 10:, physics )).
• Adding a wildcard symbol may retrieve word variants: (((((("nato science series 10:, physics") or ("radio science series 10:, physics"))) or ((("nato science theories 10:, physics") OR ("nato science theories 11:, physics"))))) or ("animal science series 10:, physics"))*.