Perhaps you should try some spelling variations:
bulgariae » bulgarian, bulgarie, bulgarians, bulgareiae, vulgariae, bulgarieiae
bulgaricae » bulgarica, bulgarische, bulgarian, bulgareicae, vulgaricae, bulgarieicae
bulgaria » bulgareia, vulgaria, bulgarieia
bulgar » bulgare, vulgar, bulgarie
bulger » bulge, bulges

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 bulgaria) OR bulgaricae) OR (bulgar OR bulger))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((bulgariae OR bulgaria) or bulgaricae) or (bulgar or bulger))*".