Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
luan chung » luan chinh
hoc thieu » toc thieu, hoc hien
hanh ban » thanh ban, hang ban, hanh san
ban luan » bang luan, ban quan, bai luan
cong van » cong vang, song van, cong tan
cong san » cong tac
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sach - hanh ban luan chung ((cong van) or (cong san)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh ban luan chung ((cong van) OR (cong san)) than cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh ban luan chung ((cong van) or (cong san)) than cau*.