Perhaps you should try some spelling variations:
wang yuhan » wang luhang, wang yan, wang yidan
lang wang » lang lang, hong wang, ping wang
john wong » john bonn
john song » john bonn, john ngosong
yuhan li » yushan li, yuan li, guan li
lu ying » li ying, ku ying, lu ding
li lu » li ju, li l, li li

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "lang wang yuhan li lu ying ((john wong) OR (john song)) sam ;~".
• Adding a wildcard symbol may retrieve word variants: lang wang yuhan li lu ying ((john wong) OR (john song)) sam ;*.