Perhaps you should try some spelling variations:
tuman john » dugan john, turn john, tropman john
tian john » brian john, ethan john, linn john
dang anh » duong anh
anh tuan » anh tran, dinh tuan, oanh tran
tuan hua » tan hua, tuan vu, yuan hui
wong sam » wong lai, von sam, wong max
wong sau » wong siu, wong shiu, wong lai
hua ren » hua chen
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 anh tuan hua ren ((tian john) OR (tuman john)) ((((wong sam) OR (wong sau))) OR (kong sar)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dang anh tuan hua ren ((tian john) OR (tuman john)) ((((wong sam) or (wong sau))) or (kong sar)) ;~".
• Adding a wildcard symbol may retrieve word variants: dang anh tuan hua ren ((tian john) OR (tuman john)) ((((wong sam) or (wong sau))) or (kong sar)) ;*.