Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh tang » hanh trang, hanh mang, hanh tung
luat tong » luat trong, luat thong, luat cong
tong cong » trong cong, cong cong, dung cong
anh tang » anh bang, anh dang, anh nang
toan ban » van ban

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: theo tieu xanh - ((hanh tang) OR (anh tang)) luat tong cong thanh ((toan tap) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - ((hanh tang) OR (anh tang)) luat tong cong thanh ((toan tap) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - ((hanh tang) OR (anh tang)) luat tong cong thanh ((toan tap) or (toan ban))*.