Perhaps you should try some spelling variations:
thong guan » cheng guan
sudan der » suden der, sudan debt, sudan das
hong guan » cheng guan, hong tan, hong gang
yang xi » yang yi, yang jui
yang ka » yang fan, yang yao
3 sudan » _ sudan, im sudan, _ sudano
der a » der _, der e
ad 3 » a 3, ad _, d 3

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: ((((yang xi) OR (yang ka))) OR (yang di))ad 3 sudan der a amin ((hong guan) OR (thong guan)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((yang xi) or (yang ka))) or (yang di))ad 3 sudan der a amin ((hong guan) OR (thong guan)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((((yang xi) or (yang ka))) or (yang di))ad 3 sudan der a amin ((hong guan) OR (thong guan)) ;*.