Perhaps you should try some spelling variations:
truong thanh » luong thanh, truong tran, tran thanh
wang dan » wang yan, wang ban, wang yidan
chia tan » chia lan, chen tan
chia wen » china won, ching wen, asia wen
wang lin » wang li, wang qin, yang lin
dan yan » dan yang, nan yan, wang yan
hai » hadi, haji, hari

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 dan yan ((chia tan) OR (chia wen)) wang lin ((truong thanh) OR (dang hai)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang dan yan ((chia tan) or (chia wen)) wang lin ((truong thanh) or (dang hai)) ;*.