Perhaps you should try some spelling variations:
dinh tuan » binh thuan, dinh tung, binh tran
tian john » brian john, ethan john, tuman john
anh tuan » anh tran, oanh tran
yan john » ryan john, gain john, von john
wong sam » wong sau, wong lai, von sam
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: wang ((anh tuan) OR (dinh tuan)) hua ren ((yan john) OR (tian john)) ((wong sam) OR (kong sar)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((anh tuan) or (dinh tuan)) hua ren ((yan john) OR (tian john)) ((wong sam) or (kong sar)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((anh tuan) or (dinh tuan)) hua ren ((yan john) OR (tian john)) ((wong sam) or (kong sar)) ;*.