Perhaps you should try some spelling variations:
yang guang » yan guan, yang liang
yang yang » wang yang, wang yan
gan guan » yan guan, quan guan, fan guon
yan yuan » yan guan, fang yuan, nan yan
liu yan » lili yan
li cong » li rong, li song, jiu cong
yan li » yang li, yuan li, gan li

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 ((((yang guang) OR (yang yang))) OR (((gan guan) OR (yan yuan)))) rui liu yan li cong shu ;~.
• Adding a wildcard symbol may retrieve word variants: wang ((((yang guang) or (yang yang))) or (((gan guan) or (yan yuan)))) rui liu yan li cong shu ;*.