Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarian, bulgarie, bulgareiae, vulgariae, bulgarieiae
bulgariaisch » bulgarisch, bulgarische, bulgareiaisch, vulgariaisch, bulgarieiaisch
bulgarians » bulgarian, bulgariens, bulgarien, bulgareians, vulgarians, bulgarieians
bulgaria » bulgareia, vulgaria, bulgarieia
bulgar » bulgare, vulgar, bulgarie
bulger » bulge, 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 (bulgariaisch OR bulgarians))) OR (bulgar OR bulger)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bulgariae or (bulgaria or (bulgariaisch OR bulgarians))) or (bulgar or bulger))".
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or (bulgaria or (bulgariaisch OR bulgarians))) or (bulgar or bulger))*.