Perhaps you should try some spelling variations:
sach mang » cach mang, sach nang, hoach mang
dong cong » duong cong, dung cong, dang cong
ho trieu » mot trieu, 25 trieu, 30 trieu
mang cua » manh cua, dung 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
doan » doanh, dan, toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho trieu tinh - sach mang cua dong cong tan ((phan dau) or (chan doan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho trieu tinh - sach mang cua dong cong tan ((phan dau) OR (chan doan)).
• Adding a wildcard symbol may retrieve word variants: ho trieu tinh - sach mang cua dong cong tan ((phan dau) or (chan doan))*.