Perhaps you should try some spelling variations:
physical sciences » medical sciences
sciences serious » sciences second, sciences section
science services » science service, voice services
science overview » science review, service overview, change overview
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) OR (science overview)))) c:, mathematical AND physical sciences.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nato ((((science series) or (sciences serious))) or (((science services) OR (science overview)))) c:, mathematical and physical sciences".
• Adding a wildcard symbol may retrieve word variants: nato ((((science series) or (sciences serious))) or (((science services) OR (science overview)))) c:, mathematical and physical sciences*.