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