Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh tranh » hanh trinh, hanh trang, lanh tranh
nhung cong » dung cong, thong cong, nhung don
thanh doan » thanh toan, thinh doan, thanh loan
hang cong » dang cong, hang nong, bang cong
ho chieu » theo chieu, hoc thieu, doi chieu
doan cau » toan cau, doan dau, doan cap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - ((hanh tranh) OR (canh tranh)) va ((nhung cong) OR (hang cong)) thanh doan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - ((hanh tranh) or (canh tranh)) va ((nhung cong) OR (hang cong)) thanh doan cau~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - ((hanh tranh) or (canh tranh)) va ((nhung cong) OR (hang cong)) thanh doan cau*.