Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, dan yang
yang yang » wang yang, wang yan
dam rein » dam region, am rhein, der rein
hong shu » cong shu, tong shui, wong shiu
hong hai » shang hai, zhong tai, dang hai
hong yu » wong yue
tang » tan, lang, gang

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 yang) OR (yang yang)) dam rein tang li ((((hong shu) or (hong hai))) or (hong yu)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((dong yang) OR (yang yang)) dam rein tang li ((((hong shu) OR (hong hai))) OR (hong yu)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((dong yang) OR (yang yang)) dam rein tang li ((((hong shu) or (hong hai))) or (hong yu)) ;*".