Perhaps you should try some spelling variations:
chiet tach » chieu sach
hoc chiet » hoc thiet, hoc nhiet, hoc hien
tang luan » dung luan
cong cong » cong dong, trong cong, dung cong
tac tranh » tac thanh, tap tranh, sach tranh
tranh ban » trinh ban, tranh hang, tranh luan
tang cua » mang cua, hang cua, thong cua
cong tac » cong ty

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)) cong cong tac tranh ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chiet tach - hanh ((tang cua) OR (tang luan)) cong cong tac tranh ban".
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - hanh ((tang cua) OR (tang luan)) cong cong tac tranh ban*.