Perhaps you should try some spelling variations:
yang chang » ying chang, huang chang, yang guang
wang xiao » wang qiao, wang xiaoyi, wang xiaozu
yang yang » wang yang, wang yan
chen chan » chen chuan, cheung chan, chen chung
chan hong » can hong, chan fong, change hong
cheng ghi » cheng chu, cheng hei, hong ghi
chen zhi » chen zhe, chen zhen, chen chih

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 xiao ((yang chang) OR (yang yang)) chen chan hong ((cheng ghi) OR (chen zhi)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang xiao ((yang chang) OR (yang yang)) chen chan hong ((cheng ghi) or (chen zhi)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang xiao ((yang chang) OR (yang yang)) chen chan hong ((cheng ghi) or (chen zhi)) ;*.