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
cam nhung » cam hung, nam nhung, tham nhung
hang cam » hang ca, hang cau, hang cac
cong dan » cong tan, huong dan, cong dong
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 hang cam nhung ((cong dan) or (cong san)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh hang cam nhung ((cong dan) OR (cong san)) than cau*.