Perhaps you should try some spelling variations:
"nato science services e:, applied sciences" » "nato science service e:, applied sciences", "nato voice services e:, applied sciences", "radio science services e:, applied sciences", "national science services e:, applied sciences"
"nato science overview e:, applied sciences" » "nato science review e:, applied sciences", "nato service overview e:, applied sciences", "nato change overview e:, applied sciences", "radio science overview e:, applied sciences", "national science overview e:, applied sciences", "nato science overview over:, applied sciences"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"nato science services e:, applied sciences\") OR (\"nato science overview e:, applied sciences\"))*".
• Removing quotes may allow a broader search: (( nato science services e:, applied sciences ) OR ( nato science overview e:, applied sciences ))*.