Perhaps you should try some spelling variations:
thanh tung » thanh cong
tieu xanh » tieu danh, chieu xanh, dieu hanh
dong cong » duong cong, dung cong, dang cong
khoan cam » khoa cam, phan cam, thuan cam
thanh lap » thanh san, phan lap, thanh hai
tung cua » trung cua, tuong cua, dung cua
cua dong » chua dong, cua cong, cua dang
cong ban » cong bang, cong san, cong tan
khoan va » doan va, khoa ma, nhan va

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 - thanh tung cua dong cong ban ((((khoan cam) OR (khoan va))) OR (thanh lap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - thanh tung cua dong cong ban ((((khoan cam) OR (khoan va))) or (thanh lap))~".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - thanh tung cua dong cong ban ((((khoan cam) OR (khoan va))) or (thanh lap))*.