Perhaps you should try some spelling variations:
trung thanh » truong thanh
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
trung tuan » trung tam, tran tuan, truong thanh
cong bang » cuong bang, hong bang, cong lang
dong bang » dong san
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: theo chieu sach - thanh ((trung tuan) or (trung thanh)) nhung ((cong bang) OR (dong bang)) phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh ((trung tuan) OR (trung thanh)) nhung ((cong bang) OR (dong bang)) phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - thanh ((trung tuan) or (trung thanh)) nhung ((cong bang) OR (dong bang)) phan dau".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh ((trung tuan) or (trung thanh)) nhung ((cong bang) OR (dong bang)) phan dau*.