Perhaps you should try some spelling variations:
yang guang » yang yang, yan guan, yang liang
than china » tuan china, han china, wuhan china
wang yang » wang yan, wang liang, wang yanling
hui ying » huei ying, hoi ying, hui ping
xu gang » yu gang, zum gang, liu gang
long du » long d, long run, long did
long do » long d, longer do, long ago

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang yang) or (yang guang)) than china ((xu gang) or (hui ying)) 3 ((long du) OR (long do)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yang) OR (yang guang)) than china ((xu gang) OR (hui ying)) 3 ((long du) OR (long do)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yang) or (yang guang)) than china ((xu gang) or (hui ying)) 3 ((long du) OR (long do)) ;*".