Perhaps you should try some spelling variations:
bulgarie » bulgarien, bulgarian, vulgaris, bulgareie, vulgarie
bulgaricae » bulgarische, bulgarian, bulgaricus, bulgariane, bulgariene, bulgareicae, vulgaricae
bulgarica » bulgarisch, bulgarian, bulgarien, bulgareica, vulgarica
bulgaria » bulgareia, vulgaria
bulgar » bulgare, vulgar
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: (((bulgarie OR bulgaria) OR (bulgaricae OR (hungarian OR bulgarica))) OR (bulgar OR bulger)).
• Adding a wildcard symbol may retrieve word variants: (((bulgarie or bulgaria) or (bulgaricae or (hungarian or bulgarica))) or (bulgar or bulger))*.