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

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