Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
luan chung » luan chinh
doi chieu » doc hieu, doi chi, ho chieu
anh tang » anh bang, anh nang, anh sang
anh dang » anh dong, anh dung, anh bang
luan ung » luan hung, luon ung, luan luong
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu tinh - ((anh tang) or (anh dang)) ((luan ung) or (luan chung)) cong tac than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu tinh - ((anh tang) OR (anh dang)) ((luan ung) OR (luan chung)) cong tac than cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu tinh - ((anh tang) or (anh dang)) ((luan ung) or (luan chung)) cong tac than cau*.