Perhaps you should try some spelling variations:
chiet tach » chieu sach
thanh tung » thanh cong
ho chiet » ho chieu, ho thiet, hoc thiet
cong ban » cong bang, cong san, cong dan
cong tan » cong tac, cong san, cong thanh
tung va » trung va, tuong va, dung va
va dung » van dung, va duong, vat dung

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 tung va dung ((cong ban) OR (cong tan)) thanh san~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - thanh tung va dung ((cong ban) OR (cong tan)) thanh san".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - thanh tung va dung ((cong ban) OR (cong tan)) thanh san*.