Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thanh tran » thanh trang, thanh toan, thanh tra
quang dung » quang trung, ung dung, cuong dung
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
ban phan » ban phap, van phan, ban nhan
ban than » ban thanh, van thanh, ban hang

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - thanh tran quang dung cong ((ban phan) OR (ban than)) cau~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh tran quang dung cong ((ban phan) OR (ban than)) cau*.