Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
hanh hang » thanh hang, hang hang, hanh han
cong dan » cong san, cong tan, huong dan
than man » than ma, thanh san, tran manh
tran van » luan van

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