Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
chen sang » chen yang, chen wang, chen shuang
sang minh » kang minah, anh minh, song min
minh hong » minh cong, min hong, linh hoang
ka chuan » say chuan, hai chuan, ka chai
hong shu » cong shu, tong shui, wong shiu
ka hua » ya hua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: yang yang ((ka hua) or (ka chuan)) chen sang minh hong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: yang yang ((ka hua) OR (ka chuan)) chen sang minh hong shu ;.
• Adding a wildcard symbol may retrieve word variants: yang yang ((ka hua) or (ka chuan)) chen sang minh hong shu ;*.