Perhaps you should try some spelling variations:
wang yidan » wang yan
yidan yang » dan yang, yin yang
minh wong » minh cong, min hong, ming kong
wong siu » wong shiu, kong siu, wong sau
yang yi » yang di, yang xi, yang jui
wu sang » wu kang, wu guang, wu hsing
du sang » du yang

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 yang yi ((wu sang) OR (du sang)) minh wong siu ;~.
• Adding a wildcard symbol may retrieve word variants: wang yidan yang yi ((wu sang) or (du sang)) minh wong siu ;*.