Perhaps you should try some spelling variations:
national science » natural science, spatial science, animal science
science stories » science studies, science theories
science series » science services, science theories, sciences serious
nato science » radio science

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 10:, physics ) OR ( nato science series 1:, physics ))) OR ( national science series 10:, physics )).
• Adding a wildcard symbol may retrieve word variants: (((( nato science stories 10:, physics ) or ( nato science series 1:, physics ))) or ( national science series 10:, physics ))*.