Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
canh trinh » hanh trinh, canh tinh, anh trinh
nhung cong » dung cong, thong cong, hang cong
ho chieu » theo chieu, hoc thieu, doi chieu
san chan » san chang, san chay, ban chan
dan chan » dan gian, dan ca, van chat

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