Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
canh manh » lanh manh, canh tranh, cach mang
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, mot chieu
van manh » van minh, van anh, van hanh
cua dung » cua dang, cua dong, qua dung
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (doi chieu)) tinh - ((canh manh) or (van manh)) cua dung cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) tinh - ((canh manh) OR (van manh)) cua dung cong tan toan cao.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) tinh - ((canh manh) or (van manh)) cua dung cong tan toan cao*.