Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
quan nhung » qua nhung, cua nhung, luan chung
hoc thieu » toc thieu, hoc hien
hanh tac » canh tac, hanh cac, hanh tai
cong van » cong vang, song van, cong tan
cong san » cong tac
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan tu

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 tac quan nhung ((cong van) or (cong san)) ((than cau) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh tac quan nhung ((cong van) OR (cong san)) ((than cau) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh tac quan nhung ((cong van) or (cong san)) ((than cau) or (phan cau))*.