Perhaps you should try some spelling variations:
thanh trung » thanh tung
thanh huong » thanh hung, anh huong, thanh tung
nhung cong » dung cong, thong cong, hang cong
tieu sach » chieu sach, dien sach, te sach
cua nhung » va nhung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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