Perhaps you should try some spelling variations:
bulgariae » bulgarie, bulgarians, bulgarien, bulgareiae, vulgariae, bulgarieiae
bulgareiae » bulgarie, bulgarean, bulgariia, bulgareeiae, vulgareiae, bulgarieeiae
bulgaricae » bulgarie, bulgaricus, bulgarischen, bulgarische, bulgariene, bulgariee, bulgareicae, vulgaricae, bulgarieicae
bulgarische » bulgarischen, ungarische, bulgareische, vulgarische, bulgarieische
bulgarian » hungarian, bulgareian, vulgarian, bulgarieian
bulgarica » bulgarisch, bulgarien, bulgarie, bulgareica, vulgarica, bulgarieica
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 bulgareiae) OR ((bulgaricae OR bulgarische) OR (bulgarian OR bulgarica))) OR (bulgar OR bulger)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((bulgariae OR bulgaria) or bulgareiae) or ((bulgaricae or bulgarische) or (bulgarian or bulgarica))) or (bulgar or bulger))".
• Adding a wildcard symbol may retrieve word variants: ((((bulgariae OR bulgaria) or bulgareiae) or ((bulgaricae or bulgarische) or (bulgarian or bulgarica))) or (bulgar or bulger))*.