Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, dan yang
yang yang » wang yang, wang yan
yuan ting » yuan ming, huang ting, yuan kang
chan kang » chung kang, chan eng, chan fong
yang hua » wang hua, yang hui, ying hua
hua test » a test
yan tin » yang jin, yang lin
hong yu » wong yue

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

• Performing a fuzzy search may retrieve terms with similar spellings: dong yang yang hua test ((((yan tin) OR (yuan ting))) or (chan kang)) hong yu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong yang yang hua test ((((yan tin) OR (yuan ting))) OR (chan kang)) hong yu ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong yang yang hua test ((((yan tin) OR (yuan ting))) or (chan kang)) hong yu ;".
• Adding a wildcard symbol may retrieve word variants: dong yang yang hua test ((((yan tin) OR (yuan ting))) or (chan kang)) hong yu ;*.