Perhaps you should try some spelling variations:
cheng zhang » cheng han, zhen zhang, chen zheng
cheng wang » chen wang, chen yang, cheng han
yang yang » wang yang, wang yan
ting ping » ting peng, ting ting, ting point
ping shu » cong shu, ping ku, ping yu
dong di » dong sin
he ping » he qing, chen ping, he liping

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 yang) OR (((ting ping) OR (dong di)))) ya yu ((cheng wang) OR (cheng zhang)) he ping shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yang yang) or (((ting ping) or (dong di)))) ya yu ((cheng wang) OR (cheng zhang)) he ping shu ;~".
• Adding a wildcard symbol may retrieve word variants: ((yang yang) or (((ting ping) or (dong di)))) ya yu ((cheng wang) OR (cheng zhang)) he ping shu ;*.