Perhaps you should try some spelling variations:
bulgarien » bulgarian, bulgaria, bulgareien, vulgarien, bulgerien
bulgarienian » bulgarianian, bulgariaian, bulgarian, bulgarean, bulgariia, bulgareienian, vulgarienian, bulgerienian
bulgariens » bulgarians, bulgarias, bulgarian, bulgarie, bulgareiens, vulgariens, bulgeriens
bulgaricae » bulgarica, bulgarische, bulgaria, bulgareicae, vulgaricae, bulgericae
bulgar » bulgare, vulgar, bulger

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: ((bulgarien OR (bulgaricae OR (bulgarienian OR bulgariens))) OR bulgar).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bulgarien or (bulgaricae or (bulgarienian OR bulgariens))) or bulgar)".
• Adding a wildcard symbol may retrieve word variants: ((bulgarien or (bulgaricae or (bulgarienian OR bulgariens))) or bulgar)*.