Perhaps you should try some spelling variations:
"nato psi series, series 1: applied sciences" » "nato i series, series 1: applied sciences", "nato ii series, series 1: applied sciences", "nato iii series, series 1: applied sciences", "nato asi series, series 1: applied sciences", "nato ari series, series 1: applied sciences", "nato psi series, series 3: applied sciences", "nato psi series, series 2: applied sciences"
"nato im series, series 1: applied science" » "nato am series, series 1: applied science", "nato fm series, series 1: applied science", "nato vm series, series 1: applied science", "nato im series, series 3: applied science", "nato im series, series 2: applied science", "nato i2 series, series 1: applied science"
"nato m series, series 1: applied science" » "nato m series, series 3: applied science", "nato m series, series 2: applied science", "nato 2 series, series 1: applied science", "nato _ series, series 1: applied science", "nato 5 series, series 1: applied science", "nato a series, series 1: applied science"

Try widening your search to All Fields.

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 psi series, series 1: applied sciences") OR ((("nato im series, series 1: applied science") OR ("nato m series, series 1: applied science")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"nato psi series, series 1: applied sciences\") or (((\"nato im series, series 1: applied science\") OR (\"nato m series, series 1: applied science\"))))".
• Removing quotes may allow a broader search: (( nato psi series, series 1: applied sciences ) or ((( nato im series, series 1: applied science ) OR ( nato m series, series 1: applied science )))).
• Adding a wildcard symbol may retrieve word variants: (("nato psi series, series 1: applied sciences") or ((("nato im series, series 1: applied science") OR ("nato m series, series 1: applied science"))))*.