Perhaps you should try some spelling variations:
sciences serious » sciences second, sciences section
science services » science service, voice services
science overview » science review, service overview, change overview
medical sciences » social sciences
science stories » science studies, science theories
science series » science theories, science studies, science service

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