Perhaps you should try some spelling variations:
yang guang » yang yang, yang liang
dong yan » dong yang, dong nan, wang yan
yan wang » yuan wang, yang yang, qian wang
wang out » hang out, wang hua, wang hui
out test » out west, about test, root test
yan guan » gan guan, yihan guan, quan guan
yan yuan » fang yuan, nan yan, yan clan
das cern » das ferne, das clan
hong yu » wong yue

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: dong yan wang out test ((((yan guan) OR (yang guang))) or (((yan yuan) or (das cern)))) hong yu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong yan wang out test ((((yan guan) OR (yang guang))) OR (((yan yuan) OR (das cern)))) hong yu ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong yan wang out test ((((yan guan) OR (yang guang))) or (((yan yuan) or (das cern)))) hong yu ;".
• Adding a wildcard symbol may retrieve word variants: dong yan wang out test ((((yan guan) OR (yang guang))) or (((yan yuan) or (das cern)))) hong yu ;*.