Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgaria, bulgarie, bulgareiae, bulgariaiae, bulgarieiae
bulgar » bulgare, bulgaria, bulgarie
bulgarian » bulgareian, bulgariaian, bulgarieian, bulgaria, hungarian
bulgarien » bulgareien, bulgariaien, bulgarieien, bulgaria
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 ((((bulgar OR bulger) OR bulgarian) OR vulgar) OR bulgarien)).
• Adding a wildcard symbol may retrieve word variants: (bulgariae or ((((bulgar or bulger) or bulgarian) or vulgar) or bulgarien))*.