Perhaps you should try some spelling variations:
thiet tach » chiet tach, thuat tach
thien hach » thien thanh, hien hanh
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
vap nhung » va nhung, ve nhung, voi nhung
hanh luat » nganh luat, hang luan, hanh lam
cong san » cong tac
san hanh » san thanh, ban hanh, van hanh

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 ((thiet tach) OR (thien hach)) - ((thanh trung) OR (thanh tung)) vap nhung cong san hanh luat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thiet tach) or (thien hach)) - ((thanh trung) OR (thanh tung)) vap nhung cong san hanh luat~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thiet tach) or (thien hach)) - ((thanh trung) OR (thanh tung)) vap nhung cong san hanh luat*.