Perhaps you should try some spelling variations:
medical sciences » social sciences
national science » natural science, spatial science, animal science
science series » science services, science stories, science theories
nato science » radio science

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