Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hanh mang » nhanh mang, hanh trang, nhanh lang
30 trieu » 25 trieu
va thong » va thuong, va phuong, he thong
tran van » luan van
mang va » mang vua, hang va, bang va
tan van » tang van, luan van, dang van

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

• Performing a fuzzy search may retrieve terms with similar spellings: 30 trieu tinh - hanh mang va thong cong ((tan van) OR (tran van)) ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "30 trieu tinh - hanh mang va thong cong ((tan van) OR (tran van)) ban".
• Adding a wildcard symbol may retrieve word variants: 30 trieu tinh - hanh mang va thong cong ((tan van) OR (tran van)) ban*.