Perhaps you should try some spelling variations:
xiaoping than » xiaoping shi
xiaoping how » mapping how, xiaoping _, xiaoping shi
jie zhang » jia zhang, li zhang, bin zhang
zhang hai » zhang dai, shang hai, zhang han
wen yang » wei yang, chen yang, wang yang
wen wang » wei wang, chen wang, weng fang

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 ((xiaoping than) OR (xiaoping how)) china ((wen yang) OR (wen wang)) jie zhang hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((xiaoping than) or (xiaoping how)) china ((wen yang) OR (wen wang)) jie zhang hai ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((xiaoping than) or (xiaoping how)) china ((wen yang) OR (wen wang)) jie zhang hai ;*.