Perhaps you should try some spelling variations:
cach manh » cach mang, cach nhanh, sach danh
dong cong » duong cong, dung cong, dang cong
30 trieu » 25 trieu
manh cua » doanh cua, ban cua
cua dong » chua dong, cua cong, cua dang
cong tan » cong tac, cong san, cong thanh
phan dau » phan tu, hang dau
nhan dan » gian dan, nhan tai
tinh » trinh, dinh, minh

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 - cach manh cua dong cong tan ((phan dau) or (nhan dan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: 30 trieu tinh - cach manh cua dong cong tan ((phan dau) OR (nhan dan)).
• Adding a wildcard symbol may retrieve word variants: 30 trieu tinh - cach manh cua dong cong tan ((phan dau) or (nhan dan))*.