Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarians, bulgarien, bulgareiae, vulgariae
bulgareia » bulgariia, bulgare, bulgares, bulgareeia, vulgareia
bulgareian » bulgariian, bulgaren, bulgaresn, bulgarean, bulgarien, bulgarians, bulgareeian, vulgareian
bulgarie » bulgarien, vulgaris, vulgare, bulgareie, vulgarie
bulgarian » hungarian, bulgareian, vulgarian
bulgarica » bulgarisch, 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: (((bulgariae OR (bulgaria OR bulgareia)) OR (bulgarie OR ((bulgarian OR bulgareian) OR bulgarica))) OR (bulgar OR bulger)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((bulgariae or (bulgaria or bulgareia)) or (bulgarie or ((bulgarian OR bulgareian) or bulgarica))) or (bulgar or bulger))".
• Adding a wildcard symbol may retrieve word variants: (((bulgariae or (bulgaria or bulgareia)) or (bulgarie or ((bulgarian OR bulgareian) or bulgarica))) or (bulgar or bulger))*.