Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chong cong » cong cong, thong cong, cuong cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
cua chong » cua cong, cua chung, cua khong
tang cua » mang cua, hang cua, tang luan
cong tan » cong tac, cong san, cong thanh
tan nhan » tran nhan, tao nhan, van nhan
nhan tai » hang tai, van tai, toan tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((hieu manh) or (chieu sach)) - hanh tang cua chong cong tan nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu manh) OR (chieu sach)) - hanh tang cua chong cong tan nhan tai.
• Adding a wildcard symbol may retrieve word variants: theo ((hieu manh) or (chieu sach)) - hanh tang cua chong cong tan nhan tai*.