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 » dung cong, thong cong, hang cong
chau tinh » cuu tinh, ha tinh, cua tinh
trung va » truong va, trang va, trung ha
cong dan » cong san, cong tan, huong dan
phan dau » phan tu
hang dau » hang va, hang tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chau tinh) or (chieu sach)) - hanh trung va nhung cong dan ((phan dau) or (hang dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chau tinh) OR (chieu sach)) - hanh trung va nhung cong dan ((phan dau) OR (hang dau)).
• Adding a wildcard symbol may retrieve word variants: hoc ((chau tinh) or (chieu sach)) - hanh trung va nhung cong dan ((phan dau) or (hang dau))*.