Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarians, bulgarien, bulgareiae, vulgariae
bulgarie » bulgarien, vulgaris, vulgare, bulgareie, vulgarie
bulgarischen » ungarischen, bulgarien, ungarische, bulgarischeen, bulgareischen, vulgarischen
bulgarian » hungarian, bulgareian, vulgarian
bulgarisch » bulgarische, bulgareisch, vulgarisch
bulgaria » bulgareia, vulgaria
bulgar » bulgare, vulgar
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 bulgarie) OR bulgaria) OR (bulgarischen OR (bulgarian OR bulgarisch))) OR (bulgar OR bulger)).
• Adding a wildcard symbol may retrieve word variants: ((((bulgariae or bulgarie) or bulgaria) or (bulgarischen or (bulgarian or bulgarisch))) or (bulgar or bulger))*.