Perhaps you should try some spelling variations:
bulgariae » bulgarian, bulgarie, bulgarians, bulgareiae, vulgariae, bulgarieiae
bulgaricae » bulgarica, bulgarian, bulgarie, bulgareicae, vulgaricae, bulgarieicae
bulgareiae » bulgarian, bulgarie, bulgarean, bulgareeiae, vulgareiae, bulgarieeiae
bulgarische » bulgarischen, ungarische, bulgareische, vulgarische, bulgarieische
bulgaria » bulgareia, vulgaria, bulgarieia
bulgar » bulgare, vulgar, 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 bulgaricae) OR bulgareiae) OR bulgarische) OR (bulgar OR bulger)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((((bulgariae OR bulgaria) or bulgaricae) or bulgareiae) or bulgarische) or (bulgar or bulger))".
• Adding a wildcard symbol may retrieve word variants: (((((bulgariae OR bulgaria) or bulgaricae) or bulgareiae) or bulgarische) or (bulgar or bulger))*.