Perhaps you should try some spelling variations:
yan zhang » yuan chang, bin zhang, han chang
juan rene » juan rana
juan meng » jui meng, yuan ming
shang hai » shang kai, dang hai, chang ha
dang thi » dang hai
hong hai » zhong tai, dang hai, hong tan
wang » wing, wan, lang

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: wang yan zhang ((juan rene) OR (juan meng)) dang thi ((hong hai) OR (shang hai)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan zhang ((juan rene) OR (juan meng)) dang thi ((hong hai) or (shang hai)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yan zhang ((juan rene) OR (juan meng)) dang thi ((hong hai) or (shang hai)) ;*.