Perhaps you should try some spelling variations:
thanh thuong » thanh huong, thanh chuong, thanh phuong
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
tranh ban » trinh ban, tranh hang, tranh luan
cong tan » cong tac, cong san, cong thanh
tran ban » tran van, toan ban, tran bai
can ban » toan ban

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 - thanh thuong ((can ban) OR (van ban)) cong tan ((tran ban) OR (tranh ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - thanh thuong ((can ban) OR (van ban)) cong tan ((tran ban) or (tranh ban))~".
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - thanh thuong ((can ban) OR (van ban)) cong tan ((tran ban) or (tranh ban))*.