Perhaps you should try some spelling variations:
yang guang » yan guan, yang liang
known your » know your, knowing your, knock your
fang yuan » wang yuhan, wang yan, meng yuan
yang yang » wang yang, wang yan
chen chan » chen chuan, cheung chan, chen chung
how known » now known, how knowing
chan how » chain how, change how, chains how
li chen » yi chen, jui chen

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: wan ((fang yuan) OR (((yang guang) OR (yang yang)))) li chen chan how known your ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan ((fang yuan) or (((yang guang) OR (yang yang)))) li chen chan how known your ;~".
• Adding a wildcard symbol may retrieve word variants: wan ((fang yuan) or (((yang guang) OR (yang yang)))) li chen chan how known your ;*.