Perhaps you should try some spelling variations:
phung cong » nhung cong, phong cong, nhung chong
tang luan » dung luan
tang luat » nang suat, hang luan, tong luan
chao kha » cao kha, chai khoa, thao khoa
kha nang » phap nang, ky nang, ki nang
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than man » than ma, thanh san, tran manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: chao kha nang - anh ((tang luat) or (tang luan)) phung cong dan than man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chao kha nang - anh ((tang luat) OR (tang luan)) phung cong dan than man*.