Perhaps you should try some spelling variations:
bulgariae » bulgaricae, bulgarian, bulgarians
bulgeriae » bulgaricae, bulgarian, bulweria, bulgeiae, bulgesiae
bulger » bulge, bulges
bulgarie » bulgarian, vulgaris, vulgare
bulgarien » bulgariann, vulgarisn, vulgaren, bulgarian

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 bulgeriae) OR ((bulger OR bulgaria) OR (bulgarie OR bulgarien))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bulgariae or bulgeriae) or ((bulger or bulgaria) or (bulgarie OR bulgarien)))".
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or bulgeriae) or ((bulger or bulgaria) or (bulgarie OR bulgarien)))*.