Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tieu xanh » tieu danh, chieu xanh, dieu hanh
tang cua » hang cua, tang luan, thong cua
mang cua » manh cua, dung cua, ban cua
cong tac » cong ty
tran cau » tran chau, ran cau, tra cau
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - hanh ((tang cua) OR (mang cua)) nhung cong tac ((tran cau) OR (toan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - hanh ((tang cua) or (mang cua)) nhung cong tac ((tran cau) OR (toan cau))~".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh ((tang cua) or (mang cua)) nhung cong tac ((tran cau) OR (toan cau))*.