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
pei yang » wei yang, pei yun, yi yang
hui yang » hui ying, du yang, h yang
de long » le long, de longue
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)) ((than china) or (wang hua)) ((pei yang) or (hui yang)) de long du ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yang yang) OR (yang guang)) ((than china) OR (wang hua)) ((pei yang) OR (hui yang)) de long du ;.
• Adding a wildcard symbol may retrieve word variants: ((yang yang) or (yang guang)) ((than china) or (wang hua)) ((pei yang) or (hui yang)) de long du ;*.