Perhaps you should try some spelling variations:
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"nato arw subseries f:, computer and system science" » "nato arw subseries f:, computer and system sciences", "nato arw subseries f:, computer and systems science", "nato _ subseries f:, computer and system science", "nato arw subseries a:, computer and system science"
"nato norm subseries f:, computer and system science" » "nato norm subseries f:, computer and system sciences", "nato norm subseries f:, computer and systems science", "nato random subseries f:, computer and system science", "nato norm subseries a:, computer and system science", "nato north subseries f:, computer and system science", "nato noch subseries f:, computer and system 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 asi substrates f:, computer and system science") OR ((("nato arw subseries f:, computer and system science") OR ("nato norm subseries f:, computer and system science"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"nato asi substrates f:, computer and system science\") or (((\"nato arw subseries f:, computer and system science\") OR (\"nato norm subseries f:, computer and system science\"))))*".
• Removing quotes may allow a broader search: (( nato asi substrates f:, computer and system science ) or ((( nato arw subseries f:, computer and system science ) OR ( nato norm subseries f:, computer and system science ))))*.