Perhaps you should try some spelling variations:
thanh trung » thanh tung
hanh trung » hanh trang, manh trung, danh trung
thong cong » trong cong, tong cong, thong thong
cua thong » cua thuong, cua khong, cua tong
ho trieu » mot trieu, 25 trieu, ho chieu
30 trieu » 25 trieu
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho trieu) or (30 trieu)) tinh - ((hanh trung) OR (thanh trung)) cua thong cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho trieu) OR (30 trieu)) tinh - ((hanh trung) OR (thanh trung)) cua thong cong san toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho trieu) or (30 trieu)) tinh - ((hanh trung) OR (thanh trung)) cua thong cong san toan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho trieu) or (30 trieu)) tinh - ((hanh trung) OR (thanh trung)) cua thong cong san toan cau*.