Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarian, bulgarie, vulgariae, bulgarieiae
bulgarischen » ungarischen, bulgarien, ungarische, vulgarischen, bulgarieischen
bulgarians » bulgarian, bulgariens, bulgarien, vulgarians, bulgarieians
bulgaria » vulgaria, bulgarieia
bulgar » vulgar, bulgarie
bulgare » vulgare, bulgariee, bulgarie, bulgarien
bulger » 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 (bulgarischen OR (bulgarians OR bulgaria))) OR (((bulgar OR bulger) OR bulgare) OR bulge)).
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or (bulgarischen or (bulgarians or bulgaria))) or (((bulgar or bulger) or bulgare) or bulge))*.