Perhaps you should try some spelling variations:
dong yang » dong hoang, yang yang, dan yang
wang yang » wang yan, wang liang, wang yanling
dam rein » dam region, am rhein, der rein
wong sau » wong sam, wong siu, wong shiu
di rein » i rein, der rein
hong yu » wong yue
tang » tan, lang, gang

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 ((dong yang) OR (wang yang)) ((di rein) OR (dam rein)) tang li ((wong sau) OR (hong yu)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((dong yang) or (wang yang)) ((di rein) OR (dam rein)) tang li ((wong sau) or (hong yu)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((dong yang) or (wang yang)) ((di rein) OR (dam rein)) tang li ((wong sau) or (hong yu)) ;*.