Perhaps you should try some spelling variations:
thieu sach » chieu sach, hieu cach, theo sach
thien hach » thien thanh, hien hanh
hanh tang » hanh trang, anh tang, hanh mang
tang cua » mang cua, hang cua, tang luan
cua dung » cua dang, cua dong, qua dung
van toan » van tan, van thanh, manh toan
van tuan » van quan, van ban, anh tuan

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: toc ((thieu sach) OR (thien hach)) - hanh tang cua dung trong ((van toan) OR (van tuan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((thieu sach) or (thien hach)) - hanh tang cua dung trong ((van toan) OR (van tuan)) cau~".
• Adding a wildcard symbol may retrieve word variants: toc ((thieu sach) or (thien hach)) - hanh tang cua dung trong ((van toan) OR (van tuan)) cau*.