Perhaps you should try some spelling variations:
sciences serious » sciences second, sciences section
science stories » science studies, science series, science theories
nato sciences » nano sciences, nature sciences, nato's science
nato science » radio science, national 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 sciences serious 10:, physics ) OR ( nato science stories 10:, physics )).
• Adding a wildcard symbol may retrieve word variants: (( nato sciences serious 10:, physics ) or ( nato science stories 10:, physics ))*.