Perhaps you should try some spelling variations:
thanh hang » thanh hoang, thanh thang, tranh hang
hanh trinh » canh tranh, hanh chinh
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
25 trieu » 30 trieu
tap toan » tap doan, tap quan, bai toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: 25 trieu tinh - ((thanh hang) or (hanh trinh)) va ((hang cong) OR (dang cong)) tap toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: 25 trieu tinh - ((thanh hang) OR (hanh trinh)) va ((hang cong) OR (dang cong)) tap toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "25 trieu tinh - ((thanh hang) or (hanh trinh)) va ((hang cong) OR (dang cong)) tap toan ban".
• Adding a wildcard symbol may retrieve word variants: 25 trieu tinh - ((thanh hang) or (hanh trinh)) va ((hang cong) OR (dang cong)) tap toan ban*.