Perhaps you should try some spelling variations:
cheng guan » cheng han, thong guan
suden der » sudan der, etuden der, boden der
yang yang » wang yang, wang yan
yang yi » yang xi, yang jui
3 suden » 3 student, _ sudden, a sudden
a maine » a marine, _ maine, a marne
a main » 1 main, 2 main

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 yi) OR (yang yang))) OR (yang di))a 3 suden der ((a main) OR (a maine)) cheng guan ;~.
• Adding a wildcard symbol may retrieve word variants: ((((yang yi) or (yang yang))) or (yang di))a 3 suden der ((a main) or (a maine)) cheng guan ;*.