Perhaps you should try some spelling variations:
der rhein » des rheins
yan kong » tan kong, yan cong, nan kong
der rein » der verein, der reinen, der reise
wong sam » wong sau, wong lai, kong sar
wong yue » wang yue, hong yu
gang li » gan li, tang li, wang li
wang » wing, wan, lang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan kong ((der rhein) OR (der rein)) gang li ((wong sam) OR (wong yue)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan kong ((der rhein) OR (der rein)) gang li ((wong sam) or (wong yue)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yan kong ((der rhein) OR (der rein)) gang li ((wong sam) or (wong yue)) ;*.