Perhaps you should try some spelling variations:
"bibliotheca historica rumanien 1918" » "bibliotheca historica romaniae 1918" (Expand Search), "bibliothek historica rumanien 1918" (Expand Search)
"bibliotheca historica romania 1925918" » "bibliotheca historica romaniae 1925918" (Expand Search), "bibliotheca historica romania 1918" (Expand Search), "bibliotheca historica romania 1925" (Expand Search), "bibliothek historica romania 1925918" (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("bibliotheca historica rumanien 1918") OR ("bibliotheca historica romania 1925918"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"bibliotheca historica rumanien 1918\") OR (\"bibliotheca historica romania 1925918\"))*".
• Removing quotes may allow a broader search: (( bibliotheca historica rumanien 1918 ) OR ( bibliotheca historica romania 1925918 ))*.