Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
doc trieu » toc thieu, doc hieu, hoc thieu
tac khoan » cac khoan, tai khoan, tao khoang
khoan cam » khoa cam, khoan va, phan cam
tang cua » hang cua, tang luan, thong cua
mang cua » manh cua, dung cua, ban cua
cong tac » cong ty
dong » dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc trieu) OR (dong trieu)) tinh - hanh ((tang cua) or (mang cua)) nhung cong tac khoan cam~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc trieu) OR (dong trieu)) tinh - hanh ((tang cua) OR (mang cua)) nhung cong tac khoan cam.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc trieu) OR (dong trieu)) tinh - hanh ((tang cua) or (mang cua)) nhung cong tac khoan cam".
• Adding a wildcard symbol may retrieve word variants: ((doc trieu) OR (dong trieu)) tinh - hanh ((tang cua) or (mang cua)) nhung cong tac khoan cam*.