Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarian, bulgarie, bulgareiae, vulgariae, bulgarieiae
bulgarica » bulgarisch, bulgarian, bulgarien, bulgareica, vulgarica, bulgarieica
bulgaria » bulgareia, vulgaria, bulgarieia
bulgar » bulgare, vulgar, bulgarie
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: (((bulgariae OR bulgaria) OR (bulgariae OR bulgarica)) OR ((bulgar OR bulger) OR bulges)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((bulgariae or bulgaria) or (bulgariae or bulgarica)) or ((bulgar OR bulger) or bulges))".
• Adding a wildcard symbol may retrieve word variants: (((bulgariae or bulgaria) or (bulgariae or bulgarica)) or ((bulgar OR bulger) or bulges))*.