Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
tinh cua » trinh cua, sinh cua, tinh chat
ban cong » bang cong, phan cong, ban huong
van cong » van dong, van phong, phan cong
tan ban » toan ban, tang ban, van ban
ban cau » bang cau, ban can, van cau

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: ho ((chinh sach) OR (chiet tach)) - hanh tinh cua ((ban cong) OR (van cong)) tan ban cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chinh sach) or (chiet tach)) - hanh tinh cua ((ban cong) OR (van cong)) tan ban cau~".
• Adding a wildcard symbol may retrieve word variants: ho ((chinh sach) or (chiet tach)) - hanh tinh cua ((ban cong) OR (van cong)) tan ban cau*.