Perhaps you should try some spelling variations:
hanh tranh » hanh trinh, hanh trang, lanh tranh
chieu xanh » chieu sach, chieu sang, chieu tinh
thien anh » thien danh, tien anh, thien thanh
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong van » cong vang, cong san, song van
ban ban » ban banh, can ban, ban dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) or (thien anh)) - ((hanh tranh) or (canh tranh)) cua dung cong van ban ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (thien anh)) - ((hanh tranh) OR (canh tranh)) cua dung cong van ban ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (thien anh)) - ((hanh tranh) or (canh tranh)) cua dung cong van ban ban*.