Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, lieu tinh
thien tinh » khien tinh, thien minh, tien tinh
thanh tran » thanh trang, thanh toan, thanh tra
tran tuan » tran xuan, tran quang, tran thanh
tuan dong » tuan duong, quan dong, luan dong
dong cong » duong cong, dung cong, dang cong
cong tac » cong ty
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu tinh) OR (thien tinh)) - thanh tran tuan dong cong tac ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu tinh) OR (thien tinh)) - thanh tran tuan dong cong tac ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu tinh) OR (thien tinh)) - thanh tran tuan dong cong tac ((toan cau) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu tinh) OR (thien tinh)) - thanh tran tuan dong cong tac ((toan cau) or (toan cao))*.