Perhaps you should try some spelling variations:
chung phuong » nhung phuong, thuong phuong, dung phuong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
phuong tan » phuong tran, phuong tay, phuong lan
dong luan » dung luan, tong luan, dong xuan
hang luan » tang luan, dung luan
tran chau » tranh chap, tran huu

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 - ha ((dong luan) or (hang luan)) chung phuong tan tran chau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - ha ((dong luan) OR (hang luan)) chung phuong tan tran chau.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - ha ((dong luan) or (hang luan)) chung phuong tan tran chau*.