Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
doi chinh » do chinh, tai chinh, hoc chinh
trinh vat » trinh van, trinh luat, sinh vat
dang cong » dung cong
manh toan » thanh toan, anh tuan, tinh toan
vat dang » van dang, vat dung, va dang
dan toan » van toan, dan than, xuan toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chinh sach - canh trinh vat dang cong ((dan toan) or (manh toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chinh sach - canh trinh vat dang cong ((dan toan) OR (manh toan)) tap.
• Adding a wildcard symbol may retrieve word variants: doi chinh sach - canh trinh vat dang cong ((dan toan) or (manh toan)) tap*.