Perhaps you should try some spelling variations:
canh trinh » canh tranh, canh tinh, anh trinh
hanh trinh » canh tranh, hanh chinh
chuan nang » chua nang, chuan trang, chuc nang
nang cong » nang song, dang cong, bang cong
doc hieu » toc thieu, hoc thieu, hoc hien
ho chieu » theo chieu, hoc thieu, doi chieu
cong san » cong tac
san phan » san pham, van phan, sat phan
phan cau » phan dau, phan cac, phan tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (ho chieu)) xanh - ((canh trinh) OR (hanh trinh)) chuan nang cong san phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (ho chieu)) xanh - ((canh trinh) OR (hanh trinh)) chuan nang cong san phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (ho chieu)) xanh - ((canh trinh) OR (hanh trinh)) chuan nang cong san phan cau".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (ho chieu)) xanh - ((canh trinh) OR (hanh trinh)) chuan nang cong san phan cau*.