Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung toan » truong toan, trung tuan, trung tran
thong cong » trong cong, thong thong, phong chong
thuc tien » thuc hien
tong cong » trong cong, cong cong, dung cong
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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 tcvn) OR (thuc tien)) hanh - thanh trung toan ((thong cong) OR (tong cong)) dan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo tcvn) or (thuc tien)) hanh - thanh trung toan ((thong cong) OR (tong cong)) dan toan cau~".
• Adding a wildcard symbol may retrieve word variants: ((theo tcvn) or (thuc tien)) hanh - thanh trung toan ((thong cong) OR (tong cong)) dan toan cau*.