Perhaps you should try some spelling variations:
yang guang » yang yang, yan guan, yang liang
kang hari » dang hai, kang han
lang yan » wang yan, wang yang, zhang yan
yan yuan » yan guan, fang yuan, nan yan
qian yan » qian yi
tan yang » dan yang, tan ying, tan yong
di kang » xi kang, jin kang

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