Perhaps you should try some spelling variations:
duong tieu » dung tieu, duong tien, duong dieu
dong tieu » dong trieu, dong hieu, dong tien
hanh tran » hanh trang, thanh tran, hanh tram
dung cong » dung trong
tran xay » tra xay, tran day, trinh xay
dan than » dan chan, ban than, van than
van toan » van tuan, van tan, van thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong tieu) OR (duong tieu)) tinh - hanh tran xay dung cong ((dan than) or (van toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong tieu) OR (duong tieu)) tinh - hanh tran xay dung cong ((dan than) OR (van toan)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong tieu) OR (duong tieu)) tinh - hanh tran xay dung cong ((dan than) or (van toan)) ban".
• Adding a wildcard symbol may retrieve word variants: ((dong tieu) OR (duong tieu)) tinh - hanh tran xay dung cong ((dan than) or (van toan)) ban*.