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, chang ha
wei chen » wei shen, frei chen, jui chen
yang jie » yang jin, yang di, yang jui
pang jun » yang jui
wan yan » wang yan, nan yan, wai yan
yang xi » yang di, 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 (pang jun))) or (yang xi)) shang hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan yan zhang wei chen ((((yang jie) OR (pang jun))) OR (yang xi)) shang hai ;*.