Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thanh tung » thanh cong
bang tuong » ban tuong, bang suong, lang tuong
hoc thieu » toc thieu, hoc hien
tung lap » trung lap, dung lap, tuong lai
dan can » dan chan, dan canh, dan ca
can cau » van cau, ban cau, ca cau

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 - thanh tung lap ((bang tuong) OR (bang phuong)) dan can cau~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh tung lap ((bang tuong) or (bang phuong)) dan can cau*.