Perhaps you should try some spelling variations:
bulgariae » bulgarians, bulgarien, hungariae, vulgariae
bulgaricae » bulgarische, bulgaricus, bulgarischen, bulgariene, vulgaricae
bulgarie » bulgarien, vulgaris, vulgare, vulgarie
bulgarian » hungarian, vulgarian
bulgarica » bulgarisch, bulgarien, vulgarica
bulgaria » vulgaria
bulgar » vulgar
bulgare » vulgare, bulgarien, vulgares
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 (((bulgaricae OR bulgaria) OR bulgarie) OR (bulgarian OR bulgarica))) OR ((bulgar OR bulgare) OR bulger)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bulgariae or (((bulgaricae OR bulgaria) or bulgarie) or (bulgarian or bulgarica))) or ((bulgar or bulgare) or bulger))".
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or (((bulgaricae OR bulgaria) or bulgarie) or (bulgarian or bulgarica))) or ((bulgar or bulgare) or bulger))*.