Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
mot trieu » mot chieu, mot tri, mon triet
hanh tang » hanh trang, anh tang, hanh mang
30 trieu » 25 trieu
bo triet » mao triet, mon triet, su triet
va thong » va thuong, va phuong, he thong
cong bai » cuong bai, cong hai, cung bai
bai toan » bai tap
toan cao » toan ban, toan tap
tang va » trang va, tang van, thang 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) or (((mot trieu) or (bo triet)))) tinh - hanh tang va thong cong bai toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((30 trieu) OR (((mot trieu) OR (bo triet)))) tinh - hanh tang va thong cong bai toan cao.
• Adding a wildcard symbol may retrieve word variants: ((30 trieu) or (((mot trieu) or (bo triet)))) tinh - hanh tang va thong cong bai toan cao*.