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
dung cong » dung trong
ho chiet » ho chieu, ho thiet, hoc thiet
cong san » cong tac
toan cau » toan cao, toan tap, toan tai
toan ban » van 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 cap) or (trung tuan)) dung cong san ((toan cau) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - thanh ((trung cap) OR (trung tuan)) dung cong san ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - thanh ((trung cap) or (trung tuan)) dung cong san ((toan cau) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - thanh ((trung cap) or (trung tuan)) dung cong san ((toan cau) OR (toan ban))*.