Perhaps you should try some spelling variations:
yang cindy » yang mind
xiaodong a » xiaodong yu, xiaojing a
china dan » china data, china des, china due
china den » chinas den, china des, china does
sang minh » kang minah, anh minh, song min
dang hari » dang hai
wang » wing, wan, lang

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 xiaodong a ((china dan) OR (china den)) ((sang minh) OR (yang cindy)) dang hari ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang xiaodong a ((china dan) OR (china den)) ((sang minh) or (yang cindy)) dang hari ;~".
• Adding a wildcard symbol may retrieve word variants: wang xiaodong a ((china dan) OR (china den)) ((sang minh) or (yang cindy)) dang hari ;*.