Perhaps you should try some spelling variations:
bulgaricae » bulgarische, bulgarian, bulgarie, bulgariane, bulgariee
bulgarica » bulgarisch, bulgarian, bulgarie
bulgarien » bulgarian
bulger » bulge
bulges » bulge

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