Perhaps you should try some spelling variations:
wang yuhan » wang luhang, wang yan, wang yidan
chen chan » chen chuan, cheung chan, chen chung
know your » grow your
gan guan » yan guan, quan guan, fan guon
chan how » chain how, change how, chains how
how know » now known, you know, do know
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 ((wang yuhan) OR (gan guan)) li chen chan how know your ;~.
• Adding a wildcard symbol may retrieve word variants: wan ((wang yuhan) or (gan guan)) li chen chan how know your ;*.