Perhaps you should try some spelling variations:
than china » tuan china, han china, wuhan china
wang hong » wang yong, wang hyoung, wang lihong
hong than » hong tan, long thanh, hong hai
daun yang » du yang, tan yang, un yang
dan yang » tan yang, wang yang, yang yang
xi eang » xi zhang
xi kang » jin kang, xi zhang

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 hong than china ((daun yang) OR (dan yang)) ((xi eang) OR (xi kang)) hay ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang hong than china ((daun yang) or (dan yang)) ((xi eang) OR (xi kang)) hay ;~".
• Adding a wildcard symbol may retrieve word variants: wang hong than china ((daun yang) or (dan yang)) ((xi eang) OR (xi kang)) hay ;*.