Perhaps you should try some spelling variations:
"bibliothek historica rumanien 1935" » "bibliothek historica romaniae 1935" (Expand Search), "bibliothek historica rumanien 1925" (Expand Search), "bibliothek historica rumanien 1938" (Expand Search), "bibliothek historica rumanien 1918" (Expand Search)
"bibliotheca historica romania 1918" » "bibliotheca historica romaniae 1918" (Expand Search), "bibliotheca historica romania 1925" (Expand Search), "bibliotheca historica rumanien 1918" (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"bibliotheca historica romania 1918\") OR (\"bibliothek historica rumanien 1935\"))~".
• Removing quotes may allow a broader search: (( bibliotheca historica romania 1918 ) OR ( bibliothek historica rumanien 1935 ))~.
• Adding a wildcard symbol may retrieve word variants: (("bibliotheca historica romania 1918") OR ("bibliothek historica rumanien 1935"))*.