Perhaps you should try some spelling variations:
thieu sach » chieu sach, hieu cach, theo sach
thien hach » thien thanh, hien hanh
phuong ban » phuong bang, phuong lan, phuong bac
ban thanh » ban hanh, ban hang
thanh cau » thanh chau, thanh mau, nhanh cau
lap bang » cao bang, mat bang, can bang
lap ban » lap luan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sach) OR (thien hach)) - thanh cong ((lap bang) or (lap ban)) phuong ban thanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (thien hach)) - thanh cong ((lap bang) OR (lap ban)) phuong ban thanh cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (thien hach)) - thanh cong ((lap bang) or (lap ban)) phuong ban thanh cau*".