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
lang cong » dang cong, bang cong, hang cong
cong san » cong tac
toan cao » toan ban
toan tap » toan ban
va lang » va nang, hoa lang

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 va lang cong san ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh hang va lang cong san ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh hang va lang cong san ((toan cao) or (toan tap))*.