Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarian, bulgarie, bulgareiae, vulgariae, bulgarieiae
bulgaria » bulgareia, vulgaria, bulgarieia
bulgareieiaisch » bulgareeieiaisch, vulgareieiaisch, bulgarieeieiaisch
bulgar » bulgare, vulgar, bulgarie
bulger » bulges

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: ((bulgariae OR (bulgaria OR bulgareieiaisch)) OR (bulgar OR (bulger OR bulge))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bulgariae or (bulgaria or bulgareieiaisch)) or (bulgar or (bulger OR bulge)))".
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or (bulgaria or bulgareieiaisch)) or (bulgar or (bulger OR bulge)))*.