Perhaps you should try some spelling variations:
bulgariae » bulgarian, bulgarians, bulgarien, bulgareiae, vulgariae
bulgaricae » bulgarica, bulgarische, bulgarian, bulgareicae, vulgaricae
bulgarie » bulgarien, bulgarian, vulgaris, bulgareie, vulgarie
bulgareian » bulgarian, bulgarean, bulgarien, bulgareeian, vulgareian
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 bulgaricae) OR (bulgarie OR (bulgareian OR bulgaria))) OR (bulgar OR bulger)).
• Adding a wildcard symbol may retrieve word variants: (((bulgariae or bulgaricae) or (bulgarie or (bulgareian or bulgaria))) or (bulgar or bulger))*.