Perhaps you should try some spelling variations:
yang guang » yang yang, yan guan, yang liang
yan yuan » yan guan, fang yuan, nan yan
qian yan » qian jun, qian yi
tan yang » dan yang, tan ying, tan yong
jie kang » jin kang, jie zhang, jie song
wie kann » wie man
wan yan » wang yan, nan yan, wai yan
hari » hard, hadi, haji

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 yan ((((yan yuan) OR (yang guang))) OR (qian yan)) tan yang ((jie kang) OR (wie kann)) hari ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan yan ((((yan yuan) or (yang guang))) or (qian yan)) tan yang ((jie kang) OR (wie kann)) hari ;~".
• Adding a wildcard symbol may retrieve word variants: wan yan ((((yan yuan) or (yang guang))) or (qian yan)) tan yang ((jie kang) OR (wie kann)) hari ;*.