Perhaps you should try some spelling variations:
wang xiuyan » wang xinyan, wang xuan
cheng zhang » cheng han, zhen zhang, chen zheng
wang yuhan » wang luhang, wang yan, wang yidan
zhang wai » zhang wei, zhang dai, change wai
wai chung » lai chung
chung suk » chong suk, chung sue
zhang li » zhang lei, zhang lin, zhang i
li cheng » li chen, xi cheng, lei sheng

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang xiuyan) or (wang yuhan)) zhang li cheng zhang wai chung suk ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang xiuyan) OR (wang yuhan)) zhang li cheng zhang wai chung suk ;*.