Perhaps you should try some spelling variations:
yan zhang » yuan chang, bin zhang, han chang
zhang lei » zhang wei, zhang dai
shang hai » shang kai, dang hai, chang ha
lei chen » li chen, frei chen, lei sheng
yang jie » yang jin, yang di, yang jui
wan yan » wang yan, nan yan, wai yan
yang yi » yang di, yang xi, 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 lei chen ((yang jie) or (yang yi)) shang hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan yan zhang lei chen ((yang jie) OR (yang yi)) shang hai ;.
• Adding a wildcard symbol may retrieve word variants: wan yan zhang lei chen ((yang jie) or (yang yi)) shang hai ;*.