Perhaps you should try some spelling variations:
chiet tach » chieu sach
thong cong » trong cong, tong cong, thong thong
hoc chiet » hoc thiet, hoc nhiet, hoc hien
tang luan » dung luan
dan thanh » dang thanh, danh thanh, ban thanh
thanh ban » thanh san, thanh van, thanh bac
tang cua » mang cua, hang cua, thong cua
cong dan » cong san, cong tan, huong dan

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 - hanh ((tang cua) or (tang luan)) thong cong dan thanh ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - hanh ((tang cua) OR (tang luan)) thong cong dan thanh ban.
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - hanh ((tang cua) or (tang luan)) thong cong dan thanh ban*.