Perhaps you should try some spelling variations:
bulgariae » bulgaria, bulgarian, bulgarians
bulgareie » bulgaria, bulgarien, bulgare
bulgarie » bulgarien, bulgaria, bulgarian
bulgaricae » bulgarica, bulgarische, bulgaria

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