Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgaria, bulgarie, bulgareiae, bulgeriae, bulgariaiae
bulgarian » bulgaria, hungarian, bulgareian, bulgerian, bulgariaian
bulgarische » bulgarischen, ungarische, bulgareische, bulgerische, bulgariaische
bulgeria » bulgaria, bulweria, bulgarica
bulgar » bulgare, bulger, bulgaria

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 (bulgarische OR bulgeria)) OR ((bulgar OR vulgar) OR bulge)).
• Adding a wildcard symbol may retrieve word variants: (((bulgariae or bulgarian) or (bulgarische or bulgeria)) or ((bulgar or vulgar) or bulge))*.