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