Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
chiet tach » chieu sach
trinh luan » trinh luat, trinh quan, trinh han
dung cong » dung trong
tinh cua » trinh cua, sinh cua, tinh chat
cong dan » cong san, cong tan, huong dan
dan van » dang van, doan van, dao van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu nganh) or (chiet tach)) - hanh ((trinh luan) or (tinh cua)) dung cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu nganh) OR (chiet tach)) - hanh ((trinh luan) OR (tinh cua)) dung cong dan van ban.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu nganh) or (chiet tach)) - hanh ((trinh luan) or (tinh cua)) dung cong dan van ban*.