Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
tong cong » trong cong, cong cong, dung cong
mang cua » manh cua, dung cua, ban cua
long cua » luong cua, cong cua, dong cua
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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 - nhanh ((mang cua) or (long cua)) tong cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - nhanh ((mang cua) OR (long cua)) tong cong dan than cau.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - nhanh ((mang cua) or (long cua)) tong cong dan than cau*.