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