Perhaps you should try some spelling variations:
bulgeriia » bulgariia, bulgaria, bulgarica
vulgaria » bulgaria, vulgaris, vulgari
bulgar » vulgar, bulger, bulgaria
bulgare » vulgare, bulgere, bulgariae, bulgarie, bulgarien

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: ((bulgaars OR (bulgeriia OR vulgaria)) OR (bulgar OR bulgare)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bulgaars or (bulgeriia or vulgaria)) or (bulgar OR bulgare))".
• Adding a wildcard symbol may retrieve word variants: ((bulgaars or (bulgeriia or vulgaria)) or (bulgar OR bulgare))*.