Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
hanh hang » thanh hang, hang hang, hanh han
ca nhung » cua nhung, cam nhung, va nhung
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
phan cau » phan cac, phan tu, phan lap
phan dau » phan tu, hang dau
hang ca » hang va, nang cao, hang tai

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 hang ca nhung ((cong dan) or (cong san)) ((phan cau) OR (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh hang ca nhung ((cong dan) OR (cong san)) ((phan cau) OR (phan dau))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - hanh hang ca nhung ((cong dan) or (cong san)) ((phan cau) OR (phan dau))*".