Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
trung cua » truong cua, trung tuan, trung cap
luong san » luong van, xuong san, duong san
luong va » dung va
phap cau » phan cau, pha cau, phap ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - thanh trung cua cong ((luong va) or (luong san)) phap cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh trung cua cong ((luong va) OR (luong san)) phap cau.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh trung cua cong ((luong va) or (luong san)) phap cau*.