Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarian, bulgarie, bulgareiae, bulgeriae, bulgarieiae
vulgarische » bulgarische, bulgarischen, bulgarischer
bulgarians » bulgarian, bulgariens, bulgarien, bulgareians, bulgerians, bulgarieians
bulgaria » bulgareia, bulgeria, bulgarieia
bulgar » bulgare, bulger, bulgarie
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 (vulgare OR vulgar)) 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 (vulgare OR vulgar)) or bulge))".
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or (vulgarische or (bulgarians or bulgaria))) or ((bulgar or (vulgare OR vulgar)) or bulge))*.