Perhaps you should try some spelling variations:
yang yang » wang yan
wang yang » wang yan, wang liang, wang yanling
yuan ting » yuan ming, huang ting, yuan kang
hua chen » jui chen, yu chen, a chen
hong zhi » zhong zhi, hong ghi, zhang zhi
dong di » dong sin
yan tin » yang jin, yang lin

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((((yang yang) or (wang yang))) or (dong di)) ya hua chen ((yan tin) OR (yuan ting)) hong zhi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((yang yang) OR (wang yang))) OR (dong di)) ya hua chen ((yan tin) OR (yuan ting)) hong zhi ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((yang yang) or (wang yang))) or (dong di)) ya hua chen ((yan tin) OR (yuan ting)) hong zhi ;".
• Adding a wildcard symbol may retrieve word variants: ((((yang yang) or (wang yang))) or (dong di)) ya hua chen ((yan tin) OR (yuan ting)) hong zhi ;*.