Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hien hach » hien hanh, hien nhanh, hien khanh
trinh cua » trinh luat, trinh quan, trinh luan
tong cong » trong cong, cong cong, dung cong
tinh cua » sinh cua, tinh chat, tranh cua
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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