Perhaps you should try some spelling variations:
yang guang » yan guan, yang liang
than china » tuan china, han china, wuhan china
yang yang » wang yang, wang yan
yuan hui » yuan fei, jaan hui, tuan hua
yang fan » zhang fan, yang dean, yang jun
yang jin » yang jie, yang jun, ying jin
long du » long d, long do, long run

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 (yang guang)) ((yuan hui) or (than china)) pei ((yang fan) OR (yang jin)) long du ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yang yang) OR (yang guang)) ((yuan hui) OR (than china)) pei ((yang fan) OR (yang jin)) long du ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yang yang) or (yang guang)) ((yuan hui) or (than china)) pei ((yang fan) OR (yang jin)) long du ;".
• Adding a wildcard symbol may retrieve word variants: ((yang yang) or (yang guang)) ((yuan hui) or (than china)) pei ((yang fan) OR (yang jin)) long du ;*.