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