Perhaps you should try some spelling variations:
bulgariae » bulgarian, bulgarians, bulgare, bulgareiae, vulgariae
bulgaricae » bulgarische, bulgarian, bulgarischen, bulgariane, bulgareicae, vulgaricae
bulgarien » bulgarian, bulgareien, vulgarien, bulgariann, vulgarisn, vulgaren
bulgarica » bulgarisch, bulgarian, bulgareica, vulgarica
bulgaria » bulgareia, vulgaria
bulgar » bulgare, vulgar
bulgarie » bulgareie, vulgarie, bulgarian, vulgaris, vulgare
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 bulgaria) OR (bulgaricae OR (bulgarien OR bulgarica))) OR ((bulgar OR bulgarie) OR bulger)).
• Adding a wildcard symbol may retrieve word variants: (((bulgariae or bulgaria) or (bulgaricae or (bulgarien or bulgarica))) or ((bulgar or bulgarie) or bulger))*.