Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trung » thanh trung, hanh trang, manh trung
nhung cong » thong cong, hang cong, nhung don
hoc chieu » hoc thieu, ho chieu, hoc hien
trung cua » truong cua, trung tuan, trung cap
dung cong » dung trong
tran chau » tranh chap, tran huu
tran cau » toan cau, ran cau, tra cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - hanh trung cua ((nhung cong) or (dung cong)) tan ((tran cau) OR (tran chau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh trung cua ((nhung cong) OR (dung cong)) tan ((tran cau) OR (tran chau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh trung cua ((nhung cong) or (dung cong)) tan ((tran cau) OR (tran chau))".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh trung cua ((nhung cong) or (dung cong)) tan ((tran cau) OR (tran chau))*.