Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
yuan kang » yuan wang, yuan chang, chan kang
dan yang » daun yang, tan yang, wang yang
wang lei » wang wei, wang fei, wang li
lei test » ein test, ai test, api test
yang li » yang lin, yang di, yang xi
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: ((dan yang) or (yang yang)) wang lei test ((yuan kang) or (yang li)) hong yu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dan yang) OR (yang yang)) wang lei test ((yuan kang) OR (yang li)) hong yu ;.
• Adding a wildcard symbol may retrieve word variants: ((dan yang) or (yang yang)) wang lei test ((yuan kang) or (yang li)) hong yu ;*.