Perhaps you should try some spelling variations:
"union bulgare OR bulgarien four la paix et four la societe OR society des nationen*" » "union bulgaren OR bulgarien four la paix et four la societe OR society des nationen*" (Expand Search), "union bulgare OR bulgarien fur la paix et fur la societe OR society des nationen*" (Expand Search), "union bulgare OR bulgarien our la paix et our la societe OR society des nationen*" (Expand Search), "union bulgare OR bulgarien cour la paix et cour la societe OR society des nationen*" (Expand Search), "union bulgare OR bulgarien four la paix et four la societa OR society des nationen*" (Expand Search), "union bulgare OR bulgarien four la paix et four la societe OR society des nationalen*" (Expand Search), "union bulgare OR bulgarien four la paix et four la societe OR society des stationen*" (Expand Search), "union bulgare OR bulgarien four la paix et four la societe OR society des nation*" (Expand Search)

You may be able to get more results by adjusting your search query.

• Removing quotes may allow a broader search: union (bulgare OR bulgarien) four la paix et four la (societe OR society) des nationen*.