Perhaps you should try some spelling variations:
duong truong » duong trong, truong trung, tang truong
canh tran » canh tranh, hanh trang, banh trang
van duong » van dong, van dung, van phong
ho trieu » mot trieu, 25 trieu, ho chieu
30 trieu » 25 trieu
tran van » luan van
dan toan » van toan, dan than, manh toan
van than » van thanh, van thang, van tuan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho trieu) OR (30 trieu)) tinh - canh tran van duong truong ((dan toan) OR (van than)) tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho trieu) OR (30 trieu)) tinh - canh tran van duong truong ((dan toan) or (van than)) tap~".
• Adding a wildcard symbol may retrieve word variants: ((ho trieu) OR (30 trieu)) tinh - canh tran van duong truong ((dan toan) or (van than)) tap*.