Perhaps you should try some spelling variations:
chiet tach » chieu sach
tang luan » dung luan
ho chiet » ho chieu, ho thiet, hoc thiet
tang cua » mang cua, hang cua, thong cua
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cau » toan cao, toan ban, toan 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 - hanh ((tang cua) or (tang luan)) nhung ((cong dan) or (cong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - hanh ((tang cua) OR (tang luan)) nhung ((cong dan) OR (cong san)) toan cau.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh ((tang cua) or (tang luan)) nhung ((cong dan) or (cong san)) toan cau*.