Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
yang tran » nang trang, yang dean, yang fan
yang john » young john, king john, yang jin
wong sam » wong sau, wong lai, von sam
tran yi » tan yi, tran thi, tran dai
yi chen » jui chen
sar » sara, star, saur

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yang tran yi chen ((yang john) or (yang di)) ((wong sam) OR (kong sar)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang tran yi chen ((yang john) OR (yang di)) ((wong sam) OR (kong sar)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang tran yi chen ((yang john) or (yang di)) ((wong sam) OR (kong sar)) ;".
• Adding a wildcard symbol may retrieve word variants: wang yang tran yi chen ((yang john) or (yang di)) ((wong sam) OR (kong sar)) ;*.