Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
canh trinh » canh tranh, hanh trinh, canh tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
duong van » duong va, luong va, dang van
trinh va » trinh van, trinh vat, trinh ve
song van » hoang van, trong van, dang van

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 - canh trinh va nhung ((song van) OR (duong van)) phan tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - canh trinh va nhung ((song van) OR (duong van)) phan tu".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - canh trinh va nhung ((song van) OR (duong van)) phan tu*.