Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, yang yang
dong sink » dong sin, dong bin, dong ping
van thanh » tran thanh, phan thanh, lam thanh
tong shui » tong hui, cong shu, gong hui
hua chen » jui chen, a chen, hua ren
yan than » yan zhang, yan clan, yan guan
yu chen » yu cheng, yi chen, yulu chen

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong yang) or (dong sink)) ya ((hua chen) OR (yu chen)) ((yan than) or (van thanh)) tong shui ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong yang) OR (dong sink)) ya ((hua chen) OR (yu chen)) ((yan than) OR (van thanh)) tong shui ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong yang) or (dong sink)) ya ((hua chen) OR (yu chen)) ((yan than) or (van thanh)) tong shui ;*".