Perhaps you should try some spelling variations:
bulgerische » bulgarische, bulgarischen, bulgarischer, bulgesische
bulgereia » bulgaria, bulgariia, bulgeseia
bulgar » bulgare, bulgaria, bulgarie
bulger » bulges
bilgere » bilger, bilgeri, billigere

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: ((bulgerische OR (bulgereia OR vulgar)) OR (((bulgar OR bulger) OR bulge) OR bilgere)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bulgerische or (bulgereia or vulgar)) or (((bulgar OR bulger) or bulge) or bilgere))".
• Adding a wildcard symbol may retrieve word variants: ((bulgerische or (bulgereia or vulgar)) or (((bulgar OR bulger) or bulge) or bilgere))*.