Perhaps you should try some spelling variations:
xiaobo zhang » xiabo zhang, xiao zhang, xiaobo wang
china zhang » china chang, cheng zhang, chin chang
than china » tuan china, han china, wuhan china
liang tan » liang dan, liang sun, wing tan
zhang ya » zhang yan, zhang y, zhang yi
han hua » tan hua, wang hua, tuan hua

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: liang tan ((han hua) OR (than china)) china zhang xiaobo zhang ya ;~.
• Adding a wildcard symbol may retrieve word variants: liang tan ((han hua) or (than china)) china zhang xiaobo zhang ya ;*.