Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
hieu quan » hieu qua, lieu quan, thien quan
tang luan » dung luan
mang cua » manh cua, dung cua, ban cua
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, van thanh
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu quan - hanh ((tang luan) or (mang cua)) nhung phuong ((dan toan) or (van toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu quan - hanh ((tang luan) OR (mang cua)) nhung phuong ((dan toan) OR (van toan)) cau.
• Adding a wildcard symbol may retrieve word variants: ho hieu quan - hanh ((tang luan) or (mang cua)) nhung phuong ((dan toan) or (van toan)) cau*.