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 series c:, mathematical and social 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 series c:, mathematical and social sciences", "social 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"

Try widening your search to All Fields.

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

• 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\"))".
• Removing quotes may allow a broader search: (( national science series c:, mathematical and medical sciences ) OR ( spatial science series c:, mathematical and medical 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"))*.