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