Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
tranh cua » doanh cua, manh cua
dung cong » dung trong
hang cong » dang cong, hang nong, bang cong
doan phan » doanh phan, toan phan, dan phan
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 - canh tranh cua ((dung cong) or (hang cong)) doan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - canh tranh cua ((dung cong) OR (hang cong)) doan phan dau.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - canh tranh cua ((dung cong) or (hang cong)) doan phan dau*.