Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarian, bulgarians, bulgareiae, vulgariae, bulgeriae
bulgareien » bulgarien, bulgarian, bulgariens, bulgareeien, vulgareien, bulgereien
bulgarie » bulgarien, bulgarian, vulgaris, bulgareie, vulgarie, bulgerie
bulgaria » bulgareia, vulgaria, bulgeria
bulgar » bulgare, vulgar, bulger
bulges » bulge

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