Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
canh trinh » canh tranh, canh tinh, anh trinh
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
ho chieu » theo chieu, hoc thieu, doi chieu
san chan » san chang, dan chan, san chay
chan tu » phan tu, han tu, chon tu

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