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
tran tuan » tran xuan, tran quang, tran thanh
dung cua » dung luan, dung cho
van toan » van tuan, van thanh, manh toan
van tan » van tuan, van ban, van tai

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh ((dung cua) OR (tran tuan)) nhung cong ((van toan) OR (van tan)) ban~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh ((dung cua) or (tran tuan)) nhung cong ((van toan) or (van tan)) ban*.