Perhaps you should try some spelling variations:
thanh tung » thanh cong
tuan dang » tran dang, tuan bang, tuan dung
dang cong » dung cong
chi xanh » chi anh, chi danh, chi hanh
cong tac » cong ty
tran cau » tran chau, toan cau, ran cau
toan ban » van ban
doi chi » doi khi

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: doi chi xanh - ((thanh trung) OR (thanh tung)) tuan dang cong tac ((tran cau) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi xanh - ((thanh trung) OR (thanh tung)) tuan dang cong tac ((tran cau) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - ((thanh trung) OR (thanh tung)) tuan dang cong tac ((tran cau) or (toan ban))*.