Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh tranh » canh tranh, hanh trinh, lanh tranh
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » dung cong, thong cong, nhung don
hang cong » dang cong, hang nong, bang cong
ho chieu » theo chieu, hoc thieu, doi chieu
ban toan » bai toan, ban than, van toan
toan cau » toan cao, toan ban, toan tap

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 - ((hanh tranh) or (hanh trang)) va ((nhung cong) or (hang cong)) ban toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - ((hanh tranh) OR (hanh trang)) va ((nhung cong) OR (hang cong)) ban toan cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - ((hanh tranh) or (hanh trang)) va ((nhung cong) or (hang cong)) ban toan cau*.