Perhaps you should try some spelling variations:
dang luong » nang luong, dung luong, hang luong
luong cong » dung cong, trong cong, cong cong
mot trieu » mot chieu, mot tri, mon triet
hanh tran » hanh trang, thanh tran, hanh tram
tran dang » tran quang, tran hoang, tranh hang
30 trieu » 25 trieu
tan toan » tan tran, van toan, dan toan
tap toan » tap doan, tap quan, bai toan

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 (30 trieu)) tinh - hanh tran dang luong cong ((tan toan) OR (tap toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot trieu) OR (30 trieu)) tinh - hanh tran dang luong cong ((tan toan) OR (tap toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot trieu) or (30 trieu)) tinh - hanh tran dang luong cong ((tan toan) OR (tap toan)) cau".
• Adding a wildcard symbol may retrieve word variants: ((mot trieu) or (30 trieu)) tinh - hanh tran dang luong cong ((tan toan) OR (tap toan)) cau*.