Perhaps you should try some spelling variations:
"national science series c:, mathematical and medical sciences" » "natural science series c:, mathematical and medical sciences", "animal science series c:, mathematical and medical sciences", "natural sciences series c:, mathematical and medical sciences", "national science services c:, mathematical and medical sciences", "national science stories c:, mathematical and medical sciences", "national science theories c:, mathematical and medical sciences"
"spatial science series c:, mathematical and medical sciences" » "spatial science services c:, mathematical and medical sciences", "spatial science stories c:, mathematical and medical sciences", "spatial science theories c:, mathematical and medical sciences"
"social science series c:, mathematical and medical sciences" » "social science services c:, mathematical and medical sciences", "social science stories c:, mathematical and medical sciences", "social science theories c:, mathematical and medical sciences"
"social science series c:, mathematical and social sciences" » "social science services c:, mathematical and social sciences", "social science stories c:, mathematical and social sciences", "social science theories c:, mathematical and social sciences"

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: (("national science series c:, mathematical and medical sciences") OR ((("spatial science series c:, mathematical and medical sciences") OR ((("social science series c:, mathematical and medical sciences") OR ("social science series c:, mathematical and social sciences")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"national science series c:, mathematical and medical sciences\") or (((\"spatial science series c:, mathematical and medical sciences\") or (((\"social science series c:, mathematical and medical sciences\") OR (\"social science series c:, mathematical and social sciences\"))))))".
• Removing quotes may allow a broader search: (( national science series c:, mathematical and medical sciences ) or ((( spatial science series c:, mathematical and medical sciences ) or ((( social science series c:, mathematical and medical sciences ) OR ( social science series c:, mathematical and social sciences )))))).
• Adding a wildcard symbol may retrieve word variants: (("national science series c:, mathematical and medical sciences") or ((("spatial science series c:, mathematical and medical sciences") or ((("social science series c:, mathematical and medical sciences") OR ("social science series c:, mathematical and social sciences"))))))*.