Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
dong sink » dong sin, dong bin
dong ping » dong sin, dong bin, dong jung
hua test » a test
yang thi » dang thi, yang chik, yang di
thi hong » tan hong
hong shu » cong shu, tong shui, wong shiu

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) or (((dong sink) OR (dong ping)))) ya hua test yang thi hong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yang yang) OR (((dong sink) OR (dong ping)))) ya hua test yang thi hong shu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yang yang) or (((dong sink) OR (dong ping)))) ya hua test yang thi hong shu ;*".