Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sang » chieu sach, chieu xanh, hieu lang
canh tran » canh tranh, hanh trang, banh trang
dung cong » dung trong
tran tin » tran tien, trang tin, toan tin
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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: theo chieu sang - canh tran tin dung cong ((dan toan) OR (dan than)) cao~.
• Adding a wildcard symbol may retrieve word variants: theo chieu sang - canh tran tin dung cong ((dan toan) or (dan than)) cao*.