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

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 luat) 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 luat) OR (tinh cua)) tong cong dan than cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien hach) or (thien hach)) - hanh ((trinh luat) or (tinh cua)) tong cong dan than cao*.