Perhaps you should try some spelling variations:
liang zwang » xiliang zhang
wang liang » wang yang
hard thing » hard things, hardly think
thing here » things here, things were, being here
zwang 3.3 » zwang 3.2, fang 3.3, zwang 13
3.3 hard » 3.1 hard, 3.3 shared, 5.3.3 hard
tan yong » tan hong, tan kong, tan yang
dong did » long did, dong sin, dong bin
dong di » dong sin

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 3.3 hard thing here ((tan yong) OR (((dong did) OR (dong di)))) ;~.
• Adding a wildcard symbol may retrieve word variants: wang liang zwang 3.3 hard thing here ((tan yong) or (((dong did) or (dong di)))) ;*.