Perhaps you should try some spelling variations:
bulgariae » bulgaria, bulgarian, bulgarie, bulgareiae, vulgariae, bulgariaiae
bulgaricae » bulgarica, bulgaria, bulgarian, bulgareicae, vulgaricae, bulgariaicae
bulgarische » bulgarischen, ungarische, bulgareische, vulgarische, bulgariaische
bulgar » bulgare, vulgar, bulgaria
bulger » bulge, bulges

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