Perhaps you should try some spelling variations:
chiet tach » chieu sach
trung tuan » trung thanh, trung tam, tran tuan
trung cap » truong cao, trung tam
ho chiet » ho chieu, ho thiet, hoc thiet
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan tap » toan ban

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 tuan) or (trung cap)) nhung ((cong tan) OR (cong san)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - thanh ((trung tuan) OR (trung cap)) nhung ((cong tan) OR (cong san)) toan tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - thanh ((trung tuan) or (trung cap)) nhung ((cong tan) OR (cong san)) toan tap*".