Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, yang yang
dong nan » dong sin, dong bin, dong cao
hua main » haul main, a main, hua ban
main yan » main bank, main am, nan yan
long shu » cong shu, tong shui, long du
yan jiu » yang jie, yang jin, pang jiu
sar » sara, star, saur

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong nan) or (dong yang)) ya hua main yan jiu ((long shu) or (kong sar)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong nan) OR (dong yang)) ya hua main yan jiu ((long shu) OR (kong sar)) ;*.