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