Perhaps you should try some spelling variations:
yong yang » dong yang, ying yang, kyoung yang
yang yang » wang yang, wang yan
chen ming » cheng ming, chen ping, chan ming
wong siu » wong shiu, kong siu, wong sau
von sach » von fach, von sprach, von sa
li chen » yi chen, jui chen
di li » li li

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((yong yang) or (yang yang)) di li chen ming ((wong siu) or (von sach)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((yong yang) OR (yang yang)) di li chen ming ((wong siu) OR (von sach)) ;*.