Perhaps you should try some spelling variations:
nhung huong » nhung phuong, nhung tuong, nhung cong
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu sach) or (chieu sang)) - canh tranh cua nhung huong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu sach) OR (chieu sang)) - canh tranh cua nhung huong dan toan cau*.