Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarian, bulgarie, bulgeriae, bulgarieiae
vulgarische » bulgarische, bulgarischen, bulgarischer
bulgarians » bulgarian, bulgariens, bulgarien, bulgerians, bulgarieians
bulgaria » bulgeria, bulgarieia
bulgar » bulger, bulgarie
bulgare » bulgere, bulgariee, bulgarie, bulgarien, vulgares
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 (vulgarische OR (bulgarians OR bulgaria))) OR (((bulgar OR vulgar) OR (bulgare OR vulgare)) OR bulge)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bulgariae or (vulgarische or (bulgarians or bulgaria))) or (((bulgar OR vulgar) or (bulgare or vulgare)) or bulge))".
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or (vulgarische or (bulgarians or bulgaria))) or (((bulgar OR vulgar) or (bulgare or vulgare)) or bulge))*.