Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
tranh cua » doanh cua, manh cua
dung cong » dung trong
doan phan » doanh phan, toan phan, dan phan
ho chieu » theo chieu, hoc thieu, doi chieu
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - canh tranh cua ((thong cong) or (dung cong)) doan phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - canh tranh cua ((thong cong) OR (dung cong)) doan phan cac.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - canh tranh cua ((thong cong) or (dung cong)) doan phan cac*.