Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu sach » chieu sach, hieu cach, dien sach
va phuong » va thuong, cac phuong
doc hieu » toc thieu, hoc thieu, hoc hien
va duong » van duong, va tuong, va huong
cong dan » cong san, cong tan, huong dan
than cau » toan cau, phan cau, than cap
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu sach - thanh trung ((va duong) or (va phuong)) cong dan ((than cau) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sach - thanh trung ((va duong) OR (va phuong)) cong dan ((than cau) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: doc hieu sach - thanh trung ((va duong) or (va phuong)) cong dan ((than cau) or (phan dau))*.