Perhaps you should try some spelling variations:
chiet tach » chieu sach
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
dung cong » dung trong
tang cua » mang cua, hang cua, tang luan
cua dung » cua dang, cua dong, qua dung
cong san » cong tac
tran cau » tran chau, toan cau, tra cau
ran cau » van cau, ban cau, can 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: theo ((hieu manh) OR (chiet tach)) - hanh tang cua dung cong san ((tran cau) OR (ran cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu manh) or (chiet tach)) - hanh tang cua dung cong san ((tran cau) OR (ran cau))~".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu manh) or (chiet tach)) - hanh tang cua dung cong san ((tran cau) OR (ran cau))*.