Perhaps you should try some spelling variations:
vulgariae » bulgariae, vulgarise, bulgaricae
bulgarie » bulgarien, bulgarian, vulgaris, bulgareie, vulgarie
bulgarica » bulgarisch, bulgarian, bulgarien, bulgareica, vulgarica
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: ((vulgariae OR ((bulgarie OR bulgarie) OR (bulgaria OR bulgarica))) OR (bulgar OR bulger)).
• Adding a wildcard symbol may retrieve word variants: ((vulgariae or ((bulgarie or bulgarie) or (bulgaria or bulgarica))) or (bulgar or bulger))*.