Perhaps you should try some spelling variations:
chiet tach » chieu sach
nhung cong » dung cong, thong cong, hang cong
cong thanh » dong thanh, cong trinh, cong tan
thanh than » thanh thanh, thanh thang, thanh toan
trung cap » truong cao
ho chiet » ho chieu, ho thiet, hoc thiet
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 cap) or (trung tam)) nhung cong thanh than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - thanh ((trung cap) OR (trung tam)) nhung cong thanh than cau.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - thanh ((trung cap) or (trung tam)) nhung cong thanh than cau*.