Perhaps you should try some spelling variations:
military art » military _
19th century » 18th century, 20th century
military a » military _
2f history » imf history, etf history, ref history
2f 19th » 20 19th, 2.1 19th

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: %((((military a) OR (military art))jt) OR (((military a) OR (military art)))) AND science %2f history %2f 19th century%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((((military a) OR (military art))jt) or (((military a) OR (military art)))) and science %2f history %2f 19th century%22".
• Adding a wildcard symbol may retrieve word variants: %((((military a) OR (military art))jt) or (((military a) OR (military art)))) and science %2f history %2f 19th century%22*.