Perhaps you should try some spelling variations:
luan trong » quan trong, luat trong, luan tuong
chua xang » chua nang, chu bang, chua dong
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: cho ((chuc nang) or (chua xang)) - hanh tang luan trong cong van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cho ((chuc nang) OR (chua xang)) - hanh tang luan trong cong van toan cau*.