Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgaria, bulgarie, bulgareiae, vulgariae, bulgeriae
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 (bulgarian OR bulgarica)) OR (bulgar OR (bulges OR bulge))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bulgariae or (bulgarian or bulgarica)) or (bulgar or (bulges OR bulge)))".
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or (bulgarian or bulgarica)) or (bulgar or (bulges OR bulge)))*.