Perhaps you should try some spelling variations:
dinh wang » dinh tung, ping wang
wei sheng » kwei sheng, wei shang, lei sheng
shang hai » shang kai, dang hai, chang ha
nam dinh » nam binh, tam ninh
wang wei » zhang wei, wang zhi
yang jin » yang jie, yang jun, ying jin
yang jui » yang judy, yang yi
yang xi » yang yi

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: nam dinh wang wei sheng ((((((yang jin) OR (yang di))) OR (yang jui))) OR (yang xi)) shang hai ;~.
• Adding a wildcard symbol may retrieve word variants: nam dinh wang wei sheng ((((((yang jin) or (yang di))) or (yang jui))) or (yang xi)) shang hai ;*.