Perhaps you should try some spelling variations:
ghana china » china china, ghana ghana
china zhang » china chang, cheng zhang, chin chang
zhang zhang » zhen zhang, cheng zhang, zhang fang
wang yidan » wang yan
zhang hua » zhang hui, zhang shuo, wang hua
zhong tai » hong hai, zhong zhi
hong ghi » zhong zhi, hong g, hong hai
tan » than

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

• If you are trying to use Boolean operators, they must be ALL CAPS: wang yidan ghana china zhang zhang hua ((((hong ghi) OR (zhong tai))) OR (hong tan)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang yidan ghana china zhang zhang hua ((((hong ghi) or (zhong tai))) or (hong tan)) ;*.