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