Perhaps you should try some spelling variations:
trinh luan » trinh luat, trinh quan, trinh han
nhung cong » dung cong, thong cong, hang cong
hien hach » thien hach, hien hanh, hien nhanh
trinh cua » trinh luat, trinh quan, trinh chat
tinh cua » sinh cua, tinh chat, tranh cua
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hach - hanh ((((trinh cua) OR (trinh luan))) OR (tinh cua)) nhung cong dan van ban~.
• Adding a wildcard symbol may retrieve word variants: hoc hien hach - hanh ((((trinh cua) or (trinh luan))) or (tinh cua)) nhung cong dan van ban*.