Perhaps you should try some spelling variations:
vulgaris » bulgaria, vulgar
vulgaria » bulgaria, vulgari, vulvaria
bulgarien » bulgarian, bulgaria, bulgareien, vulgarien, bulgerien
bulgerien » bulgariens, bulgarian, bulgarie
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: ((vulgaris OR (vulgaria OR (bulgarien OR bulgerien))) OR (bulgar OR bulges)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vulgaris or (vulgaria or (bulgarien OR bulgerien))) or (bulgar or bulges))".
• Adding a wildcard symbol may retrieve word variants: ((vulgaris or (vulgaria or (bulgarien OR bulgerien))) or (bulgar or bulges))*.