Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
khan sher » han shen, khan syed, than she
chang won » chang soon, chang ann, chang you
chang min » zhang ming, chang mae, chan ming
hong shu » cong shu, tong shui, wong shiu
yan yan » yan yuan, nan yan, wang yan
wang » wing, wan, lang

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: wang ((yan yan) OR (yang yang)) khan sher ((chang won) OR (chang min)) hong shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan yan) or (yang yang)) khan sher ((chang won) OR (chang min)) hong shu ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((yan yan) or (yang yang)) khan sher ((chang won) OR (chang min)) hong shu ;*.