Perhaps you should try some spelling variations:
bulgarie » vulgaris, vulgare
bulgarien » vulgarisn, vulgaren
bulgariae » bulgaricae, bulgarians, bulgarica
bulgarian » hungarian
bulgare » vulgare, 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: (((bulgarie OR ((bulgariae OR bulgarien) OR bulgarian)) OR bulgaria) OR (bulgare OR bulger)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((bulgarie or ((bulgariae OR bulgarien) or bulgarian)) or bulgaria) or (bulgare or bulger))".
• Adding a wildcard symbol may retrieve word variants: (((bulgarie or ((bulgariae OR bulgarien) or bulgarian)) or bulgaria) or (bulgare or bulger))*.