Perhaps you should try some spelling variations:
thanh dung » thanh duong, thanh tung, hanh dung
thanh hung » thanh huong, thanh tung, thanh trung
thong cong » trong cong, tong cong, thong thong
mot chieu » doi chieu
ho chieu » theo chieu, hoc thieu, doi chieu
va thong » va thuong, va phuong, he thong
cong san » cong tac
san toan » van toan, dan toan, manh 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 (mot chieu)) xanh - ((thanh dung) OR (thanh hung)) va thong cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (mot chieu)) xanh - ((thanh dung) OR (thanh hung)) va thong cong san toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (mot chieu)) xanh - ((thanh dung) OR (thanh hung)) va thong cong san toan cao".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (mot chieu)) xanh - ((thanh dung) OR (thanh hung)) va thong cong san toan cao*.