Perhaps you should try some spelling variations:
doi chinh » do chinh, tai chinh, hoc chinh
canh manh » lanh manh, canh tranh, cach mang
cua khong » cua phuong, cua thuong, cua cong
hua khong » hoa khong, hoac khong, phuc khong
trong dan » trong dang, trong san, trong tan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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 manh ((cua khong) or (hua khong)) trong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chinh sach - canh manh ((cua khong) OR (hua khong)) trong dan than cau.
• Adding a wildcard symbol may retrieve word variants: doi chinh sach - canh manh ((cua khong) or (hua khong)) trong dan than cau*.