Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » thong cong, nhung don, nhung lang
hang cong » dang cong, hang nong, bang cong
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
tranh va » tranh van, trang va, trinh va
san toan » van toan, dan toan, manh toan
toan tap » toan ban

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 va ((((nhung cong) OR (hang cong))) OR (dung cong)) san toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh tranh va ((((nhung cong) OR (hang cong))) or (dung cong)) san toan tap~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh tranh va ((((nhung cong) OR (hang cong))) or (dung cong)) san toan tap*.