Perhaps you should try some spelling variations:
"bibliotheca historica rumanien 1938" » "bibliotheca historica romaniae 1938" (Expand Search), "bibliotheca historica rumanien 1918" (Expand Search), "bibliotheca historica rumanien 1935" (Expand Search), "bibliotheca historica rumanien 1925" (Expand Search)
"bibliothek historica romania 1918" » "bibliothek historica romaniae 1918" (Expand Search), "bibliothek historica romania 1925" (Expand Search), "bibliothek historica rumanien 1918" (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: (("bibliothek historica romania 1918") OR ("bibliotheca historica rumanien 1938"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"bibliothek historica romania 1918\") OR (\"bibliotheca historica rumanien 1938\"))".
• Removing quotes may allow a broader search: (( bibliothek historica romania 1918 ) OR ( bibliotheca historica rumanien 1938 )).
• Adding a wildcard symbol may retrieve word variants: (("bibliothek historica romania 1918") OR ("bibliotheca historica rumanien 1938"))*.