Perhaps you should try some spelling variations:
chiet tach » chieu sach
hoc chiet » hoc thiet, hoc nhiet, hoc hien
thanh ban » thanh san, thanh van, thanh bac
tranh va » tranh van, trang va, trinh va
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than ban » toan ban, than man, nhuan ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chiet tach - canh tranh va nhung ((cong dan) or (cong san)) ((than ban) OR (thanh ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - canh tranh va nhung ((cong dan) OR (cong san)) ((than ban) OR (thanh ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chiet tach - canh tranh va nhung ((cong dan) or (cong san)) ((than ban) OR (thanh ban))".
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - canh tranh va nhung ((cong dan) or (cong san)) ((than ban) OR (thanh ban))*.