Perhaps you should try some spelling variations:
sciences serious » sciences second, sciences section
science theories » science theory, science three
science studies » science study, defence studies
science series » science services, science stories, 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 studies))) OR (sciences serious))) OR (science theories)) 1:, applied sciences.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nato ((((((science series) OR (science studies))) or (sciences serious))) or (science theories)) 1:, applied sciences".
• Adding a wildcard symbol may retrieve word variants: nato ((((((science series) OR (science studies))) or (sciences serious))) or (science theories)) 1:, applied sciences*.