Perhaps you should try some spelling variations:
nhung huong » nhung phuong, nhung tuong, nhung cong
hieu quan » hieu qua, lieu quan, thien quan
thong cua » thong quan, thong tu, huong cua
manh toan » thanh toan, anh tuan, tinh toan
mang cua » manh cua, dung cua, ban cua
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 ((thong cua) or (mang cua)) nhung huong ((van toan) or (manh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu quan - hanh ((thong cua) OR (mang cua)) nhung huong ((van toan) OR (manh toan)) cau.
• Adding a wildcard symbol may retrieve word variants: ho hieu quan - hanh ((thong cua) or (mang cua)) nhung huong ((van toan) or (manh toan)) cau*.