Perhaps you should try some spelling variations:
dong sind » dong sin, dong bin, dong ping
sang minh » kang minah, anh minh, song min
shang hai » shang kai, dang hai, chang ha
dong nan » dong yang, dong sin, dong bin
tang min » chang min, yang mind, tang li
hong hai » zhong tai, dang hai, hong tan
ya a » a a, y a, ye a

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 sind)) ya a test ((tang min) or (sang minh)) ((hong hai) OR (shang hai)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong nan) OR (dong sind)) ya a test ((tang min) OR (sang minh)) ((hong hai) OR (shang hai)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong nan) or (dong sind)) ya a test ((tang min) or (sang minh)) ((hong hai) OR (shang hai)) ;*".