Perhaps you should try some spelling variations:
thong cong » trong cong, thong thong, phong chong
tong cong » trong cong, cong cong, dung cong
30 trieu » 25 trieu
mang vua » mang cua, hang va, bang va
tap toan » tap doan, tap quan, bai toan
toan ban » van ban
mang va » hang va, bang va, dang va

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 - nhanh ((mang vua) or (mang va)) ((thong cong) or (tong cong)) tap toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: 30 trieu tinh - nhanh ((mang vua) OR (mang va)) ((thong cong) OR (tong cong)) tap toan ban.
• Adding a wildcard symbol may retrieve word variants: 30 trieu tinh - nhanh ((mang vua) or (mang va)) ((thong cong) or (tong cong)) tap toan ban*.