Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thanh tung » thanh cong
hoc thieu » toc thieu, hoc hien
cap hoang » cam hoang, cau hoang, van hoang
cap hang » cap bang, cap han, cau thang
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
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 - ((thanh trung) or (thanh tung)) ((cap hang) or (cap hoang)) cong tac than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - ((thanh trung) OR (thanh tung)) ((cap hang) OR (cap hoang)) cong tac than cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - ((thanh trung) or (thanh tung)) ((cap hang) or (cap hoang)) cong tac than cau*.