Perhaps you should try some spelling variations:
chiet tach » chieu sach
trung tuan » trung thanh, tran tuan, truong thanh
nhung cong » dung cong, thong cong, hang cong
ho chiet » ho chieu, ho thiet, hoc thiet
cong dan » cong san, cong tan, huong dan
than cau » toan cau, phan cau, than cap
phan dau » phan tu, hang dau

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: ho chiet tach - thanh ((trung tuan) OR (trung tam)) nhung cong dan ((than cau) OR (phan dau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - thanh ((trung tuan) OR (trung tam)) nhung cong dan ((than cau) or (phan dau))~".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - thanh ((trung tuan) OR (trung tam)) nhung cong dan ((than cau) or (phan dau))*.