Perhaps you should try some spelling variations:
bulgaricae » bulgarica, bulgarian, bulgaricus
bulgarische » bulgarischen, ungarische
bulgeriae » bulgariae, bulgarian, bulweria
bulgarie » bulgarien, bulgarian, vulgaris
bulgare » vulgare, bulgarien, vulgares

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