Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
than tap » toan tap, han tap, phan tap

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: hoc chieu xanh - canh tranh cua nhung ((cong tan) OR (cong san)) than tap~.
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - canh tranh cua nhung ((cong tan) or (cong san)) than tap*.