Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, truong thanh
hanh mang » nhanh mang, hanh trang, nhanh lang
ho trieu » mot trieu, 30 trieu, ho chieu
25 trieu » 30 trieu
cong tan » cong tac, cong san, cong ty
toan ban » van ban
mang va » mang vua, hang va, bang va
va dung » van dung, va duong, vat dung

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 (25 trieu)) tinh - hanh mang va dung ((cong tan) OR (cong thanh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho trieu) OR (25 trieu)) tinh - hanh mang va dung ((cong tan) OR (cong thanh)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho trieu) or (25 trieu)) tinh - hanh mang va dung ((cong tan) OR (cong thanh)) toan ban".
• Adding a wildcard symbol may retrieve word variants: ((ho trieu) or (25 trieu)) tinh - hanh mang va dung ((cong tan) OR (cong thanh)) toan ban*.