Perhaps you should try some spelling variations:
than china » tuan china, han china, wuhan china
wang wing » wang jing, wang ning, wang liang
gene sang » lee sang, gene bank
sang tin » sang minh, lang tim, sang tae
tan zhi » yan zhi, wang zhi, tan chia
hong g » hong ng, hong w, hong a
hong 7 » hong w, hong a

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 ((tan zhi) OR (than china)) gene sang tin ((hong g) OR (hong 7)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang wing ((tan zhi) or (than china)) gene sang tin ((hong g) OR (hong 7)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang wing ((tan zhi) or (than china)) gene sang tin ((hong g) OR (hong 7)) ;*.