Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
thanh trung » thanh tung
chiet tach » chieu sach
hoc chiet » hoc thiet, hoc nhiet, hoc hien
va phuong » va thuong, cac phuong
san than » sang than, san thanh, van than
ban than » ban thanh, van thanh, ban hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chiet tach - ((canh tranh) or (thanh trung)) va phuong cong ((san than) OR (ban than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - ((canh tranh) OR (thanh trung)) va phuong cong ((san than) OR (ban than)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chiet tach - ((canh tranh) or (thanh trung)) va phuong cong ((san than) OR (ban than)) cau*".