Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, dan yang
yang yang » wang yang, wang yan
a region » a regional
hong shu » cong shu, tong shui, wong shiu
yan tan » yan clan, yan guan, yan wang
tan tan » tas tan, tin tan, tang tang
ya a » a a, y a, ye a
sin » sign, sind, skin

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: ((((dong yang) OR (yang yang))) OR (dong sin)) ya a region ((yan tan) OR (tan tan)) hong shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((dong yang) or (yang yang))) or (dong sin)) ya a region ((yan tan) OR (tan tan)) hong shu ;~".
• Adding a wildcard symbol may retrieve word variants: ((((dong yang) or (yang yang))) or (dong sin)) ya a region ((yan tan) OR (tan tan)) hong shu ;*.