Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
lanh manh » lanh tranh, lan anh, van manh
manh cua » doanh cua, ban cua
cua dung » cua dang, cua dong, qua dung
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - lanh manh cua dung ((cong dan) or (cong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - lanh manh cua dung ((cong dan) OR (cong san)) toan cau.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - lanh manh cua dung ((cong dan) or (cong san)) toan cau*.