Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
trung tuan » trung thanh, tran tuan, truong thanh
cong bang » cuong bang, dong bang, hong bang
bang phan » nang phan, bang nhan, bang thanh
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 chieu sach - thanh ((trung tam) or (trung tuan)) trong cong bang phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh ((trung tam) OR (trung tuan)) trong cong bang phan cau*.