Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
luan nhung » luan chung, luan hung, quan nhung
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
manh toan » thanh toan, anh tuan, tinh toan
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 ((hieu manh) or (chinh sach)) - hanh tang luan nhung phuong ((dan toan) OR (manh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu manh) OR (chinh sach)) - hanh tang luan nhung phuong ((dan toan) OR (manh toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((hieu manh) or (chinh sach)) - hanh tang luan nhung phuong ((dan toan) OR (manh toan)) cao".
• Adding a wildcard symbol may retrieve word variants: doi ((hieu manh) or (chinh sach)) - hanh tang luan nhung phuong ((dan toan) OR (manh toan)) cao*.