Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgaria, bulgarie, bulgareiae, bulgeriae, bulgariaiae
bulgarien » bulgaria, bulgareien, bulgerien, bulgariaien
bulgarian » bulgaria, hungarian, bulgareian, bulgerian, bulgariaian
vulgarisns » vulgarises, vulgaris, bulgariens
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 (bulgarien OR (bulgarian OR vulgarisns))) OR (bulgar OR vulgar)).
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or (bulgarien or (bulgarian or vulgarisns))) or (bulgar or vulgar))*.