Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgaria, bulgarie, vulgariae, bulgariaiae, bulgarieiae
bulgarian » bulgaria, vulgarian, bulgariaian, bulgarieian
bulgarica » bulgaria, bulgarisch, bulgarien, vulgarica, bulgariaica, bulgarieica
bulgar » vulgar, bulgaria, bulgarie
bulgare » vulgare, bulgariae, bulgariee, bulgarie, bulgarien
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 ((bulgarian OR hungarian) OR bulgarica)) OR ((bulgar OR bulgare) OR bulger)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bulgariae or ((bulgarian or hungarian) or bulgarica)) or ((bulgar OR bulgare) or bulger))".
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or ((bulgarian or hungarian) or bulgarica)) or ((bulgar OR bulgare) or bulger))*.