Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
nhung cong » thong cong, hang cong, nhung don
cang thang » cong thanh, dang thanh
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
thang cau » hang cau, thong cau, thanh chau
cong va » dong va, cong ha, cong tac

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 - thanh cong va ((nhung cong) or (dung cong)) cang thang cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh cong va ((nhung cong) OR (dung cong)) cang thang cau*.