Perhaps you should try some spelling variations:
yang wang » yan wang, yang guang, yang liang
yuan ting » yuan ming, huang ting, yuan kang
yang yang » wang yang, wang yan
tang minh » sang minh, tang min, kang minah
cong ghi » hong ghi, cong shu
yan run » can run, bank run, yan guan
yan kun » yan guan, yan yuan

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 wang) OR (yuan ting))) OR (yang yang)) ((yan run) OR (yan kun)) gain tang minh cong ghi ;~.
• Adding a wildcard symbol may retrieve word variants: ((((yang wang) or (yuan ting))) or (yang yang)) ((yan run) or (yan kun)) gain tang minh cong ghi ;*.