Perhaps you should try some spelling variations:
bulgarische » bulgarischen, ungarische
bulgareia » bulgariia, bulgarian, bulgare
bulgarie » bulgarien, bulgarian, vulgaris
bulger » bulge, bulges
bulgere » bulgee, bulgese, bulgare, bilgere, burgere

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: ((bulgarische OR (bulgareia OR vulgar)) OR (((bulgarie OR bulgaria) OR bulger) OR bulgere)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bulgarische or (bulgareia or vulgar)) or (((bulgarie OR bulgaria) or bulger) or bulgere))".
• Adding a wildcard symbol may retrieve word variants: ((bulgarische or (bulgareia or vulgar)) or (((bulgarie OR bulgaria) or bulger) or bulgere))*.