Perhaps you should try some spelling variations:
bulgariae » bulgarians, bulgarien, bulgarica, vulgariae
bulgaricae » bulgarica, bulgarische, bulgarischen, vulgaricae
bulgarian » hungarian, vulgarian
bulgaria » vulgaria
bulgar » vulgar
bulgarie » vulgarie, bulgarien, vulgaris, vulgare
bulgare » vulgare, bulgarien, vulgares
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 (bulgaricae OR (bulgarian OR bulgaria))) OR (((bulgar OR bulgarie) OR (bulgare OR bulgariae)) OR bulger)).
• Adding a wildcard symbol may retrieve word variants: ((bulgariae or (bulgaricae or (bulgarian or bulgaria))) or (((bulgar or bulgarie) or (bulgare or bulgariae)) or bulger))*.