Perhaps you should try some spelling variations:
"nigeria language" » "nigerian languages", "sumerian language", "media language"
"german languages" » "german language", "germanic languages", "formal languages"
"bulgare langue" » "bulgarie langue", "vulgare langue", "bulgarien langue"

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: (("bulgare langue") OR ((("nigeria language") OR ("german languages")))).
• Removing quotes may allow a broader search: (( bulgare langue ) or ((( nigeria language ) or ( german languages )))).
• Adding a wildcard symbol may retrieve word variants: (("bulgare langue") or ((("nigeria language") or ("german languages"))))*.