Perhaps you should try some spelling variations:
liang zwang » xiliang zhang
hard things » hard thing, bad things, smart things
wang liang » wang yang
irt things » first things, get things, set things
zwang 3.2 » zwang 2.2
dong ping » dong sin, dong bin, dong jung
tan yong » tan hong, tan kong, tan yang

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 liang zwang 3.2 ((irt things) OR (hard things)) have ((tan yong) OR (dong ping)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang liang zwang 3.2 ((irt things) or (hard things)) have ((tan yong) or (dong ping)) ;*.