Perhaps you should try some spelling variations:
yang john » young john, king john, yang jin
wang dan » wang yan, wang ban, wang yidan
dan tran » dan phan
tran hua » tan hua, tuan hua, tran duc
hua chen » jui chen, yu chen, a chen
yang jie » yang jin, yang di, yang jui
wong sam » wong sau, wong lai, kong sar

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang dan tran hua chen ((yang john) or (yang jie)) wong sam ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang dan tran hua chen ((yang john) OR (yang jie)) wong sam ;.
• Adding a wildcard symbol may retrieve word variants: wang dan tran hua chen ((yang john) or (yang jie)) wong sam ;*.