Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, dan yang
yang yang » wang yang, wang yan
yang hua » wang hua, yang hui, ying hua
hua west » a west, hua wei, out west
west yan » west can, west bank, west jean
tin hong » tan hong, kia hong
thi hong » tan hong

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 west yan ((tin hong) or (thi hong)) yu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong yang yang hua west yan ((tin hong) OR (thi hong)) yu ;.
• Adding a wildcard symbol may retrieve word variants: dong yang yang hua west yan ((tin hong) or (thi hong)) yu ;*.