Perhaps you should try some spelling variations:
thien danh » thien anh, thien dang, thien thanh
chieu xanh » chieu sach, chieu sang, chieu tinh
luan trong » quan trong, luat trong, luan tuong
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
cong van » cong vang, cong san, song van
van bai » van ban, van bao, van hai

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: toc ((thien danh) OR (chieu xanh)) - hanh tang luan trong cong van bai tap~.
• Adding a wildcard symbol may retrieve word variants: toc ((thien danh) or (chieu xanh)) - hanh tang luan trong cong van bai tap*.