Perhaps you should try some spelling variations:
challenges japan » challenges jaime, challenges jane, challenges john
chinas legal » china's legal, chinese legal, chinas law
china legal » china's legal, china local, chinese legal
dong wing » dong ping, dong sin, dong bin
wing tan » wing ian, liang tan, hong tan
gong hui » tong hui, tong shui, wang hui

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: dong wing tan ((chinas legal) OR (china legal)) challenges japan ((gong hui) OR (wang zhi)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong wing tan ((chinas legal) OR (china legal)) challenges japan ((gong hui) or (wang zhi)) ;~".
• Adding a wildcard symbol may retrieve word variants: dong wing tan ((chinas legal) OR (china legal)) challenges japan ((gong hui) or (wang zhi)) ;*.