Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, phong chong
hieu manh » chieu xanh, hieu nganh, dieu hanh
hieu lang » chieu sang, hieu quang, nhieu tang
hanh dinh » thanh dinh, hinh dinh, hanh tinh
dinh cua » dinh cuu, sinh cua, dinh cu
can ban » van ban, toan ban
ban cau » bang cau, ban can, van cau

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: ho ((hieu manh) OR (hieu lang)) - hanh dinh cua ((thong cong) OR (thong thong)) can ban cau~.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (hieu lang)) - hanh dinh cua ((thong cong) or (thong thong)) can ban cau*.