Perhaps you should try some spelling variations:
yan kong » tan kong, yan cong, nan kong
kong der » konig der, kong sar, kong lee
der rein » der rhein, der verein, der reinen
wang lei » wang wei, wang fei, zhang lei
wong sam » wong sau, wong lai, kong sar
wong yue » wang yue, hong yu
wang li » wang lin, tang li, wang di

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 rein ((wang li) OR (wang lei)) ((wong sam) OR (wong yue)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan kong der rein ((wang li) OR (wang lei)) ((wong sam) or (wong yue)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yan kong der rein ((wang li) OR (wang lei)) ((wong sam) or (wong yue)) ;*.