Perhaps you should try some spelling variations:
chiet tach » chieu sach
ho chiet » ho chieu, ho thiet, hoc thiet
tranh va » tranh van, trang va, trinh va
cong van » cong vang, song van, cong tan
cong san » cong tac
va dung » van dung, va duong, vat dung
tai tap » bai tap, tai tao, hai tap

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