Perhaps you should try some spelling variations:
cheng guan » cheng han, thong guan
wang yang » wang yan, wang liang, wang yanling
chan paul » jean paul, jan paul, shaw paul
yang yun » yang jun, tang yun, yang yang
yang yue » wang yue, yang jui, yang yi
guan bai » gao bai, guan li
bai chan » bai chong, hai chuan, say chan
nan yan » nan ya, wang yan, qian yan
yang xi » yang di, yang yi, yang jui

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: nan yan ((((((yang yun) or (yang yue))) or (wang yang))) or (yang xi)) cheng guan bai chan paul ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nan yan ((((((yang yun) OR (yang yue))) OR (wang yang))) OR (yang xi)) cheng guan bai chan paul ;*.