Perhaps you should try some spelling variations:
nhung huong » nhung phuong, nhung tuong, nhung cong
hieu quan » lieu quan, thien quan, lien quan
canh manh » lanh manh, canh tranh, cach mang
cua nhung » va nhung
manh cua » doanh cua, ban cua
toan tap » toan ban
toan cao » toan ban

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) or (hieu qua)) - canh manh cua nhung huong dan ((toan tap) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quan) OR (hieu qua)) - canh manh cua nhung huong dan ((toan tap) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: ho ((hieu quan) or (hieu qua)) - canh manh cua nhung huong dan ((toan tap) or (toan cao))*.