Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh tranh » canh tranh, hanh trang, lanh tranh
hanh trinh » canh tranh, hanh chinh
thoai cac » tai cac, thong cac, tho cac
ho chieu » theo chieu, hoc thieu, doi chieu
cong dan » cong san, cong tan, cong dong
ha dong » hoat dong, van dong

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: ho chieu sach - ((hanh tranh) OR (hanh trinh)) ha dong ((cong dan) OR (huong dan)) thoai cac~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - ((hanh tranh) OR (hanh trinh)) ha dong ((cong dan) or (huong dan)) thoai cac~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - ((hanh tranh) OR (hanh trinh)) ha dong ((cong dan) or (huong dan)) thoai cac*.