Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgaria, bulgarian, bulgareiae, vulgariae, bulgariaiae
bulgareiae » bulgaria, bulgarian, bulgarie, bulgareeiae, vulgareiae, bulgariaeiae
vulgari » vulgaris, vulgar, vulgare
bulgariaisch » bulgarisch, bulgarische, bulgarians, bulgareiaisch, vulgariaisch, bulgariaiaisch
bulgar » bulgare, vulgar, bulgaria
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 bulgareiae) OR (vulgari OR bulgariaisch)) OR (bulgar OR bulger)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((bulgariae OR bulgareiae) or (vulgari or bulgariaisch)) or (bulgar or bulger))".
• Adding a wildcard symbol may retrieve word variants: (((bulgariae OR bulgareiae) or (vulgari or bulgariaisch)) or (bulgar or bulger))*.