Perhaps you should try some spelling variations:
theo chiet » theo chieu, thep thiet
chiet tach » chieu sach
trang tuan » tran tuan, trung tuan, trong tuan
chung dong » chuong dong, chuong duong, phuong dong
tang luan » dung luan
toan ban » van ban
co toan » co ton, so toan, cong toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chiet tach - hanh ((trang tuan) or (tang luan)) chung dong co toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chiet tach - hanh ((trang tuan) OR (tang luan)) chung dong co toan ban.
• Adding a wildcard symbol may retrieve word variants: theo chiet tach - hanh ((trang tuan) or (tang luan)) chung dong co toan ban*.