Perhaps you should try some spelling variations:
bulgariae » bulgarie, bulgarians, bulgarien, bulgareiae, vulgariae, bulgarieiae
bulgarian » hungarian, bulgareian, vulgarian, bulgarieian
bulgaricae » bulgarische, bulgarie, bulgarischen, bulgariene, bulgariee, bulgareicae, vulgaricae, bulgarieicae
bulgarica » bulgarisch, bulgarien, bulgarie, bulgareica, vulgarica, bulgarieica
bulgareica » bulgariia, bulgareeica, vulgareica, bulgarieeica
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 bulgarian) OR (bulgaricae OR (bulgarica OR bulgareica))) OR (bulgar OR bulger)).
• Adding a wildcard symbol may retrieve word variants: ((((bulgariae or bulgaria) or bulgarian) or (bulgaricae or (bulgarica or bulgareica))) or (bulgar or bulger))*.