Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
ting ping » ting peng, ting ting, ting point
yu cheng » _ cheng
ping shu » cong shu, ping ku, ping yu
dong di » dong sin
yu chen » yi chen, yulu chen, jui chen
wang he » wang hua, wang zhi, wang wei
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) OR (yu chen)) wang 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) OR (yu chen)) wang he ping shu ;~".
• Adding a wildcard symbol may retrieve word variants: ((yang yang) or (((ting ping) or (dong di)))) ya ((yu cheng) OR (yu chen)) wang he ping shu ;*.