Perhaps you should try some spelling variations:
duong cong » dung cong, luong cong, duong trong
cong vang » cong lang, cong quang, cong ngang
vang bang » dang bang, tang bang, van bang
ho trieu » mot trieu, 25 trieu, ho chieu
30 trieu » 25 trieu
tranh va » tranh van, trang va, trinh va
va duong » van duong, va tuong, va huong
bang cau » hang cau, bang cac, nang cao

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 - canh tranh va duong cong vang bang cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho trieu) OR (30 trieu)) tinh - canh tranh va duong cong vang bang cau.
• Adding a wildcard symbol may retrieve word variants: ((ho trieu) or (30 trieu)) tinh - canh tranh va duong cong vang bang cau*.