Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarian, bulgarians, bulgareiae, vulgariae
bulgarie » bulgarien, bulgarian, vulgaris, bulgareie, vulgarie
bulgarica » bulgarisch, bulgarian, bulgarien, bulgareica, vulgarica
bulgar » bulgare, vulgar
bulgaria » bulgareia, vulgaria
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 bulgarie) OR (bulgariae OR bulgarica)) OR ((bulgar OR bulgaria) OR (bulger OR bulge))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((bulgariae or bulgarie) or (bulgariae or bulgarica)) or ((bulgar OR bulgaria) or (bulger or bulge)))".
• Adding a wildcard symbol may retrieve word variants: (((bulgariae or bulgarie) or (bulgariae or bulgarica)) or ((bulgar OR bulgaria) or (bulger or bulge)))*.