Perhaps you should try some spelling variations:
hien nganh » vien nganh, hieu nganh, trien nganh
hien nhanh » hien hanh, thien thanh, tien thanh
luan trong » quan trong, luat trong, luan tuong
tang luan » dung luan
anh tang » anh bang, anh dang, anh nang
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien nganh) or (hien nhanh)) - anh tang luan trong cong dan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nganh) OR (hien nhanh)) - anh tang luan trong cong dan than ban*.