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

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 (yang lin)) 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 (yang lin)) 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 (yang lin)) hong zhi ;".
• Adding a wildcard symbol may retrieve word variants: ((((yang yang) or (wang yang))) or (dong di)) ya hua chen ((yan tin) OR (yang lin)) hong zhi ;*.