Perhaps you should try some spelling variations:
yan zhang » yuan chang, bin zhang, han chang
zhang wei » zhen wei
shang hai » shang kai, dang hai, hong hai
wei chen » wei shen, frei chen, jui chen
yang jie » yang jin, yang jui, yang yi
chang ha » chang mae
wan yan » wang yan, nan yan, wai yan
yang xi » yang yi, yang jui

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

• Performing a fuzzy search may retrieve terms with similar spellings: wan yan zhang wei chen ((((yang jie) OR (yang xi))) or (yang di)) ((shang hai) or (chang ha)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan yan zhang wei chen ((((yang jie) OR (yang xi))) OR (yang di)) ((shang hai) OR (chang ha)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan yan zhang wei chen ((((yang jie) OR (yang xi))) or (yang di)) ((shang hai) or (chang ha)) ;*".