Perhaps you should try some spelling variations:
tuan china » wuhan china, can china, taiwan china
wang wing » wang jing, wang ning, wang liang
gene sang » lee sang, gene bank
sang minh » kang minah, anh minh, song min
jeong ghi » jeong mi
hong ghi » zhong zhi, hong g, hong hai
yan zi » yan zhi, yuan zi, ban zi

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 wing ((tuan china) OR (yan zi)) gene sang minh ((jeong ghi) OR (hong ghi)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang wing ((tuan china) or (yan zi)) gene sang minh ((jeong ghi) or (hong ghi)) ;*.