Perhaps you should try some spelling variations:
siyan john » ryan john, tian john, spillan john
chen siyan » chen jian
dang binh » dong bin, dang anh, sang minh
dann bin » dong bin
tran hua » tan hua, tuan hua, tran duc
hua chen » jui chen, yu chen, a chen
wong sam » wong sau, wong lai, von sam
sar » sara, star, saur

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((dang binh) OR (dann bin)) tran hua chen siyan john ((wong sam) OR (kong sar)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dang binh) OR (dann bin)) tran hua chen siyan john ((wong sam) or (kong sar)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((dang binh) OR (dann bin)) tran hua chen siyan john ((wong sam) or (kong sar)) ;*.