Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tieu sach » chieu sach, dien sach, te sach
hanh tang » hanh trang, hanh mang, hanh tung
cua nhung » va nhung
anh tang » anh bang, anh dang, anh nang
tan toan » tan tran, tap toan, dan toan
van toan » van tuan, van tan, van thanh

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: theo tieu sach - ((hanh tang) OR (anh tang)) cua nhung cong ((tan toan) OR (van toan)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - ((hanh tang) OR (anh tang)) cua nhung cong ((tan toan) or (van toan)) cao~".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - ((hanh tang) OR (anh tang)) cua nhung cong ((tan toan) or (van toan)) cao*.