Perhaps you should try some spelling variations:
"deutschland probleme kreuz / history / 18th century" » "deutschland polen kreuz / history / 18th century", "deutschland probleme kein / history / 18th century", "deutschland probleme klug / history / 18th century"
"deutsches problem kreuz / history / 18th century" » "deutsche probleme kreuz / history / 18th century", "ethisches problem kreuz / history / 18th century", "deutsches problem keun / history / 18th century", "deutsches problem kaluza / history / 18th century", "deutsches problem key / history / 18th century"
"deutsches rotes kreuz / history / 18th century" » "deutschen roten kreuz / history / 18th century", "deutsche rote kreuz / history / 18th century", "deutsches modell kreuz / history / 18th century", "deutsches rote kreuz / history / 18th century", "deutsches roten kreuz / history / 18th century", "deutsches roten kreuzes / history / 18th century"

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: (("deutsches rotes kreuz / history / 18th century") OR ((("deutsches problem kreuz / history / 18th century") OR ("deutschland probleme kreuz / history / 18th century")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"deutsches rotes kreuz / history / 18th century\") or (((\"deutsches problem kreuz / history / 18th century\") OR (\"deutschland probleme kreuz / history / 18th century\"))))".
• Removing quotes may allow a broader search: (( deutsches rotes kreuz / history / 18th century ) or ((( deutsches problem kreuz / history / 18th century ) OR ( deutschland probleme kreuz / history / 18th century )))).
• Adding a wildcard symbol may retrieve word variants: (("deutsches rotes kreuz / history / 18th century") or ((("deutsches problem kreuz / history / 18th century") OR ("deutschland probleme kreuz / history / 18th century"))))*.