Perhaps you should try some spelling variations:
cong vang » cong lang, cong quang, cong ngang
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
cong van » cong san, song van, cong tan
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 van) OR (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 van) OR (cong vang)) bang cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho trieu) or (30 trieu)) tinh - canh tranh va duong ((cong van) OR (cong vang)) bang cau".
• Adding a wildcard symbol may retrieve word variants: ((ho trieu) or (30 trieu)) tinh - canh tranh va duong ((cong van) OR (cong vang)) bang cau*.