Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
nhung cong » dung cong, thong cong, hang cong
tang luan » dung luan
hoc hieu » hoc thieu, hoc hien, doc hieu
tang cua » mang cua, hang cua, thong cua
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 hieu nganh - hanh ((tang cua) or (tang luan)) nhung cong dan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu nganh - hanh ((tang cua) OR (tang luan)) nhung cong dan than ban*.