Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thien danh » thien anh, thien dang, thien thanh
hanh tranh » canh tranh, hanh trinh, hanh trang
chua xang » chua nang, chu bang, chua dong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap
chuc » thuc, chu, phuc

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) or (thien danh)) - hanh tranh ((chua xang) OR (chuc nang)) cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (thien danh)) - hanh tranh ((chua xang) OR (chuc nang)) cong dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) or (thien danh)) - hanh tranh ((chua xang) OR (chuc nang)) cong dan than cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (thien danh)) - hanh tranh ((chua xang) OR (chuc nang)) cong dan than cau*.