Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
canh trinh » canh tranh, hanh trinh, anh trinh
nhung cong » dung cong, thong cong, hang cong
canh tinh » hanh tinh, manh tinh, canh tranh
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh
phan dau » hang dau

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