Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
canh manh » lanh manh, cach mang, van manh
nang cong » nang song, dang cong, bang cong
ho chieu » theo chieu, hoc thieu, mot chieu
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap
va nang » van nang, da nang, cam nang

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) OR (doi chieu)) xanh - ((canh manh) OR (canh tranh)) va nang cong dan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doi chieu)) xanh - ((canh manh) OR (canh tranh)) va nang cong dan toan cau~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) xanh - ((canh manh) OR (canh tranh)) va nang cong dan toan cau*.