Perhaps you should try some spelling variations:
duong trong » dung trong
mot trieu » mot chieu, mon triet
trong xay » thong xay, trong cac, trong ca
30 trieu » 25 trieu
tranh va » tranh van, trang va, trinh va
va duong » van duong, va tuong, va huong
dung cac » luong cac, dung cho, dung tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((mot trieu) OR (mot tri))) or (30 trieu)) tinh - canh tranh va duong trong xay dung cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((mot trieu) OR (mot tri))) OR (30 trieu)) tinh - canh tranh va duong trong xay dung cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((mot trieu) OR (mot tri))) or (30 trieu)) tinh - canh tranh va duong trong xay dung cac".
• Adding a wildcard symbol may retrieve word variants: ((((mot trieu) OR (mot tri))) or (30 trieu)) tinh - canh tranh va duong trong xay dung cac*.