Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgaria, bulgarians, bulgareiae, vulgariae, bulgeriae
bulgariaeian » bulgaricaeian, bulgariaian, bulgariansian, bulgarien, bulgarean, bulgariia, bulgareiaeian, vulgariaeian, bulgeriaeian
bulgarie » bulgarien, bulgaria, vulgaris, bulgareie, vulgarie, bulgerie
bulgarian » bulgaria, hungarian, bulgareian, vulgarian, bulgerian
bulgarica » bulgaria, bulgarisch, bulgarien, bulgareica, vulgarica, bulgerica
bulgar » bulgare, vulgar, bulger

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