Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
liang sun » liang dan, liang tan, wing sun
kann doch » dann doch, kann ich, kann sich
yan guan » gan guan, yang guang, yihan guan
yan yuan » fang yuan, nan yan, yan clan
tang wie » tang jie, lang wien, tang li
wie kann » wie man
doch sin » doch ein, doch eine, dong sin
dong di » dong sin

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: ((liang sun) OR (dong di)) ((((yan guan) OR (yang yang))) OR (yan yuan)) tang wie kann doch sin ;~.
• Adding a wildcard symbol may retrieve word variants: ((liang sun) or (dong di)) ((((yan guan) or (yang yang))) or (yan yuan)) tang wie kann doch sin ;*.