Perhaps you should try some spelling variations:
luan trong » quan trong, luat trong, luan tuong
hieu tinh » chieu tinh, lieu tinh, kieu tinh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
doc hieu » toc thieu, hoc thieu, hoc hien
cong san » cong tac
san than » sang than, san thanh, ban than
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu tinh - hanh tang luan trong cong san than cap~.
• Adding a wildcard symbol may retrieve word variants: doc hieu tinh - hanh tang luan trong cong san than cap*.