Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarian, bulgarians, bulgareiae, bulgeriae
bulgarische » bulgarischen, ungarische, bulgareische, bulgerische
bulgar » bulgare, bulger
bulgarie » bulgareie, bulgerie, bulgarien, bulgarian, vulgaris
bulgaria » bulgareia, bulgeria
vulgare » vulgaris, vulgarly

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 bulgarische) OR (((bulgar OR vulgar) OR (bulgarie OR (vulgare OR bulgaria))) OR bulge)).
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or bulgarische) or (((bulgar or vulgar) or (bulgarie or (vulgare or bulgaria))) or bulge))*.