Perhaps you should try some spelling variations:
medical sciences » social sciences
science series » science services, science stories, science theories
nato science » radio science, national science
stories c » stories _
stories a » stories _

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 (\"nato science ((stories c) OR (stories a)):, 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 (\\"nato science ((stories c) OR (stories a)):, mathematical and medical sciences\\"))\"".
• Removing quotes may allow a broader search: (( nato science series c:, mathematical and medical sciences ) or ( nato science ((stories c) OR (stories a)):, mathematical and medical sciences )).