Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
chiet tach » chieu sach
tranh cua » doanh cua, manh cua
cua nhung » va nhung
duong van » duong va, luong va, dang van
khoan cam » khoa cam, khoan va, phan cam
song van » hoang van, trong van, dang van

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chiet tach)) - canh tranh cua nhung ((song van) OR (duong van)) khoan cam~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) or (chiet tach)) - canh tranh cua nhung ((song van) OR (duong van)) khoan cam~".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (chiet tach)) - canh tranh cua nhung ((song van) OR (duong van)) khoan cam*.