Perhaps you should try some spelling variations:
chiet tach » chieu sach
trung tuan » trung thanh, trung tam, tran tuan
trung cua » truong cua, trung cap, dung cua
ho chiet » ho chieu, ho thiet, hoc thiet
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
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: ho chiet tach - thanh ((trung cua) or (trung tuan)) nhung ((cong tan) OR (cong san)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - thanh ((trung cua) OR (trung tuan)) nhung ((cong tan) OR (cong san)) than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - thanh ((trung cua) or (trung tuan)) nhung ((cong tan) OR (cong san)) than cau".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - thanh ((trung cua) or (trung tuan)) nhung ((cong tan) OR (cong san)) than cau*.