Perhaps you should try some spelling variations:
banh trang » hanh trang, ban trang, banh rang
canh tran » canh tranh, hanh trang, lanh tranh
dung cong » dung trong
doc hieu » hoc thieu, hoc hien
van dung » van dong, xay dung, tin dung
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: ((doc hieu) or (toc thieu)) tinh - ((canh tran) OR (banh trang)) van dung cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) tinh - ((canh tran) OR (banh trang)) van dung cong san toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (toc thieu)) tinh - ((canh tran) OR (banh trang)) van dung cong san toan cao".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) tinh - ((canh tran) OR (banh trang)) van dung cong san toan cao*.