Perhaps you should try some spelling variations:
bulgaars » bulgare
bulgariia » bulgarica, bulgaricae, bulgarian, bulgareiia, vulgariia, bulgeriia
vulgaria » vulgaris, vulgari, vulvaria
bulgaria » bulgareia, vulgaria, bulgeria
bulgar » bulgare, vulgar, bulger

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