Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgaria, bulgarian
bulgare » vulgare, bulgaria, vulgares
bulgarie » bulgaria, bulgarian, vulgaris
bulgarien » bulgarian, bulgariann, vulgarisn, bulgaria
bulgere » bulger, bilgere, burgere

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 (((bulgare OR (bulgarie OR bulgarien)) OR vulgar) OR bulgere)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(bulgariae or (((bulgare or (bulgarie OR bulgarien)) or vulgar) or bulgere))".
• Adding a wildcard symbol may retrieve word variants: (bulgariae or (((bulgare or (bulgarie OR bulgarien)) or vulgar) or bulgere))*.