Perhaps you should try some spelling variations:
dong hoang » hong hong
wang dong » wang yong, wang hong, wang yang
rein gang » ein gang, ein ganz, den gang
dam rein » dam region, am rhein, der rein
hong shu » cong shu, tong shui, wong shiu
gang li » gan li, tang li, wang li
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: wang dong hoang dam rein gang li ((hong shu) or (hong yu)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang dong hoang dam rein gang li ((hong shu) OR (hong yu)) ;*.