Perhaps you should try some spelling variations:
cheng chan » cheung chan, cheng han, cheng zhang
yang guang » yang yang, yang liang
chan ming » kian ming, chan eng, chan fong
ming cong » minh cong, ming kong, ming code
gui guan » gan guan, gui hua, tuo guan
yan guan » gan guan, yan yuan, yihan guan
yu cheng » yu chen, _ cheng

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 ((gui guan) OR (((yan guan) OR (yang guang)))) yu cheng chan ming cong shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan ((gui guan) or (((yan guan) OR (yang guang)))) yu cheng chan ming cong shu ;~".
• Adding a wildcard symbol may retrieve word variants: wan ((gui guan) or (((yan guan) OR (yang guang)))) yu cheng chan ming cong shu ;*.