Perhaps you should try some spelling variations:
bulgariaiae » bulgariae, bulgariia, bulgareiaiae, vulgariaiae, bulgeriaiae
bulgaricae » bulgarica, bulgaria, bulgarian, bulgareicae, vulgaricae, bulgericae
bulgarische » bulgarischen, ungarische, bulgareische, vulgarische, bulgerische
bulgar » bulgare, vulgar, bulger
bulges » bulge

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: ((bulgariaiae OR (bulgaricae OR bulgarische)) OR (bulgar OR bulges))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bulgariaiae or (bulgaricae OR bulgarische)) or (bulgar or bulges))*".