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

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 stories) OR (sciences serious))) OR (science services)) c:, mathematical AND physical sciences.
• Adding a wildcard symbol may retrieve word variants: nato ((((science stories) or (sciences serious))) or (science services)) c:, mathematical and physical sciences*.