Perhaps you should try some spelling variations:
ersten thing » ersten teils
ersten teil » ersten teils, erster teil, erste teil
yang sudan » kano sudan, yang rudai
sudan debt » sudan der, sudan west
wang yang » wang yan, wang liang, wang yanling
wang wei » zhang wei, wang zhi
dong » doing, long, done

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: wang yang sudan debt ((ersten thing) OR (ersten teil)) hiring ((dong sin) OR (wang wei)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang yang sudan debt ((ersten thing) or (ersten teil)) hiring ((dong sin) or (wang wei)) ;*.