Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
phuong dan » phuong danh, phuong doan, huong dan
chu sach » cau sach, thu sach, chuc hach
vap bang » va bang, cap bang, van bang
lap bang » lap ban, cao bang, mat bang
dan phan » doan phan, dan chan, van phan
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chu sach) OR (chieu sach)) - thanh trung ((vap bang) or (lap bang)) phuong dan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu sach) OR (chieu sach)) - thanh trung ((vap bang) OR (lap bang)) phuong dan phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu sach) OR (chieu sach)) - thanh trung ((vap bang) or (lap bang)) phuong dan phan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chu sach) OR (chieu sach)) - thanh trung ((vap bang) or (lap bang)) phuong dan phan cau*.