Perhaps you should try some spelling variations:
canh manh » lanh manh, cach mang, van manh
dang cong » dung cong
cong danh » cuong danh, cong dan, cong thanh
danh toan » manh toan, anh toan, dan toan
doc hieu » toc thieu, hoc thieu, hoc hien
ho chieu » theo chieu, hoc thieu, doi chieu
toan cao » toan ban, toan tap
va dang » van dang, va nang, va lang

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 manh) OR (canh tranh)) va dang cong danh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (ho chieu)) xanh - ((canh manh) OR (canh tranh)) va dang cong danh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (ho chieu)) xanh - ((canh manh) OR (canh tranh)) va dang cong danh toan cao".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (ho chieu)) xanh - ((canh manh) OR (canh tranh)) va dang cong danh toan cao*.