Perhaps you should try some spelling variations:
thanh tung » thanh cong
tuan thong » toan thong, tran thong, tuan phong
hien sach » dien sach, kien sach, thien hach
tung tuan » trung tuan, hung tuan, quang tuan
khoan cam » khoa cam, khoan va, phan cam
cong tac » cong ty
khan cap » khan ap, than cap, phan cac

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: hoc hien sach - thanh tung tuan thong ((cong san) OR (cong tac)) ((khan cap) OR (khoan cam))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien sach - thanh tung tuan thong ((cong san) OR (cong tac)) ((khan cap) or (khoan cam))~".
• Adding a wildcard symbol may retrieve word variants: hoc hien sach - thanh tung tuan thong ((cong san) OR (cong tac)) ((khan cap) or (khoan cam))*.